COVID-19 vaccination hesitancy among Americans with disabilities aged 18-65: An exploratory analysis

BackgroundIt is important for people with disabilities to be vaccinated against COVID-19 because, as a group, they are at increased risk of severe outcomes. While there are multiple vaccines available to prevent COVID-19, a considerable proportion of Americans report some hesitancy to becoming vaccinated, including people with disabilities.ObjectiveWe conducted a study to explore what factors may contribute to COVID-19 vaccination hesitancy among Americans with disabilities.MethodsWe used Amazon's Mechanical Turk to survey 439 people with disabilities (ages 18+) about their concerns of the COVID-19 disease, vaccines, and hesitancy toward vaccination to learn more about factors that influence vaccination hesitancy. Concerns about vaccines were analyzed as a composite variable representing different dimensions such as: side effects, too new, developed too quickly, influenced by politics, and effectiveness.ResultsResults from a logistic regression indicate that concern about vaccines was the most significant predictor of hesitancy, even after considering demographic, economic, and geographic factors. Concerns about getting COVID-19, getting tested for COVID-19, trust in experts, education, and being a Democrat were negatively associated with hesitancy.ConclusionsThese findings indicate that some groups of individuals may be more vaccination hesitant because they are more concerned about vaccine safety than COVID-19 infection. Public health messaging that focuses on the risks of vaccines relative to the risks of COVID-19 might be one strategy to reduce hesitancy and increase vaccination uptake. Messaging should also be tailored to specific disabilities (i.e. physical, mental, sensory), written in plain language, and disseminated in accessible formats.     

Measuring the impact of COVID-19 vaccination and immunity waning: A modelling study for Portugal

Vaccination strategies to control COVID-19 have been ongoing worldwide since the end of 2020. Understanding their possible effect is key to prevent future disease spread. Using a modelling approach, this study intends to measure the impact of the COVID-19 Portuguese vaccination strategy on the effective reproduction number and explore three scenarios for vaccine effectiveness waning. Namely, the no-immunity-loss, 1-year and 3-years of immunity duration scenarios. We adapted an age-structured SEIR deterministic model and used Portuguese hospitalisation data for the model calibration. Results show that, although the Portuguese vaccination plan had a substantial impact in reducing overall transmission, it might not be sufficient to control disease spread. A significant vaccination coverage of those above 5 years old, a vaccine effectiveness against disease of at least 80% and softer non-pharmaceutical interventions (NPIs), such as mask usage and social distancing, would be necessary to control disease spread in the worst scenario considered. The immunity duration scenario of 1-year displays a resurgence of COVID-19 hospitalisations by the end of 2021, the same is observed in 3-year scenario although with a lower magnitude. The no-immunity-loss scenario presents a low increase in hospitalisations. In both the 1-year and 3-year scenarios, a vaccination boost of those above 65 years old would result in a 53% and 38% peak reduction of non-ICU hospitalisations, respectively. These results suggest that NPIs should not be fully phased-out but instead be combined with a fast booster vaccination strategy to reduce healthcare burden.     

COVID-19 differentiated measures for unvaccinated individuals: The need for clear goals and strong justifications

Numerous countries and jurisdictions have implemented differential COVID-19 public health restrictions based on individual vaccination status to mitigate the public health risks posed by unvaccinated individuals. Although it is scientifically and ethically justifiable to introduce such vaccination-based differentiated measures as a risk-based approach to resume high-risk activities in an ongoing pandemic, their justification is weakened by lack of clarity on their intended goals and the specific risks or potential harms they intend to mitigate. Furthermore, the criteria for the removal of differentiated measures may not be clear, which raises the possibility of shifting goalposts without clear justification and with potential for unfairly discriminatory consequences. This paper seeks to clarify the ethical justification of COVID-19 vaccination-based differentiated measures based on a public health risk-based approach, with focus on their deployment in domestic settings. We argue that such measures should be consistent with the principal goal of COVID-19 vaccination programmes, which is to reduce the incidence of severely ill patients and associated healthcare burdens so as to protect a health system. We provide some considerations for the removal of vaccination-based differentiated measures based on this goal.     

COVID-19 vaccination rates vary by community vulnerability: A county-level analysis

We used the COVID-19 Community Vulnerability Index and 7 theme scores to assess associations between vulnerability and county-level COVID-19 vaccination (n = 2415 counties) through May 25th, 2021. When comparing vaccination rates among quintiles of CCVI scores, Theme 3 (housing type, transportation, household composition, and disability) was associated with the largest disparity, with the least vulnerable counties (Q1) having 33% higher rates of vaccination among individuals aged 18+ (53.5% vs 40.2%) compared to counties with the highest vulnerability (Q5). Using generalized linear models with binomial distributions and log links, we found that a 10-point increase in the CCVI index, socioeconomic vulnerability, housing type and composition, and epidemiological factors were associated with at least a 1.0 percentage point decline in county-level vaccination. The association between community vulnerability and lower vaccination rates suggests the need for continued efforts for equitable COVID-19 vaccination across marginalized communities.     

Projecting the impact of a two-dose COVID-19 vaccination campaign in Ontario,Canada

BackgroundA number of highly effective COVID-19 vaccines have been developed and approved for mass vaccination. We evaluated the impact of vaccination on COVID-19 outbreak and disease outcomes in Ontario, Canada.MethodsWe used an agent-based transmission model and parameterized it with COVID-19 characteristics, demographics of Ontario, and age-specific clinical outcomes. We implemented a two-dose vaccination program according to tested schedules in clinical trials for Pfizer-BioNTech and Moderna vaccines, prioritizing healthcare workers, individuals with comorbidities, and those aged 65 and older. Daily vaccination rate was parameterized based on vaccine administration data. Using estimates of vaccine efficacy, we projected the impact of vaccination on the overall attack rate, hospitalizations, and deaths. We further investigated the effect of increased daily contacts at different stages during vaccination campaigns on outbreak control.ResultsMaintaining non-pharmaceutical interventions (NPIs) with an average of 74% reduction in daily contacts, vaccination with Pfizer-BioNTech and Moderna vaccines was projected to reduce hospitalizations by 27.3% (95% CrI: 22.3% − 32.4%) and 27.0% (95% CrI: 21.9% − 32.6%), respectively, over a one-year time horizon. The largest benefits of vaccination were observed in preventing deaths with reductions of 31.5% (95% CrI: 22.5% − 39.7%) and 31.9% (95% CrI: 22.0% − 41.4%) for Pfizer-BioNTech and Moderna vaccines, respectively, compared to no vaccination. We found that an increase of only 10% in daily contacts at the end of lockdown, when vaccination coverage with only one dose was 6%, would trigger a surge in the outbreak. Early relaxation of population-wide measures could lead to a substantial increase in the number of infections, potentially reaching levels observed during the peak of the second wave in Ontario.ConclusionsVaccination can substantially mitigate ongoing COVID-19 outbreaks. Sustaining population-wide NPIs, to allow for a sufficient increase in population-level immunity through vaccination, is essential to prevent future outbreaks.     

The impact of seasonal influenza vaccination uptake on COVID-19 vaccination attitudes in a rural area in Greece

IntroductionPromoting vaccination for coronavirus disease 2019 (COVID-19), especially for high-risk groups such as the elderly and persons with comorbidities, is important for reducing the incidence of severe disease and death.MethodsRetrospective cross-sectional study of factors associated with COVID-19 vaccination, including previous influenza vaccination, among all persons who received medical services in a rural area in Crete, Greece, between October 2020-May 2021.ResultsAmong 3129 participants, receipt of influenza vaccination in 2020–21 was strongly associated with COVID-19 vaccination, as was influenza vaccination in 2019–20, albeit to a lesser extent. In addition, persons older than 59 years (with exception of those 90 + years old) and those who lived closer to the hospital/health center, were more likely to vaccinate for COVID-19. Persons younger than 40 years of age, females, persons with mental illness or neurologic disease, were also less likely to vaccinate for COVID-19 (all p < 0.001).ConclusionsCOVID-19 vaccination was more likely among those who were vaccinated for influenza before and during the pandemic. Access to healthcare services and specific comorbidities, were important influencers for vaccination, underlying the importance of tailored interventions to enforce vaccination in high-risk groups.     

Impact of prenatal COVID-19 vaccination on delivery and neonatal outcomes: Results from a New York City cohort

Research suggest prenatal vaccination against coronavirus disease-19 (COVID-19) is safe. However, previous studies utilized retrospectively collected data or examined late pregnancy vaccinations. We investigated the associations of COVID-19 vaccination throughout pregnancy with delivery and neonatal outcomes. We included 1,794 mother-neonate dyads enrolled in the Generation C Study with known prenatal COVID-19 vaccination status and complete covariate and outcome data. We used multivariable quantile regressions to estimate the effect of prenatal COVID-19 vaccination on birthweight, delivery gestational age, and blood loss at delivery; and Poisson generalized linear models for Caesarean delivery (CD) and Neonatal Intensive Care Unit (NICU) admission. Using the above methods, we estimated effects of trimester of vaccine initiation on these outcomes. In our sample, 13.7% (n = 250) received at least one prenatal dose of any COVID-19 vaccine. Vaccination was not associated with birthweight (β = 12.42 g [-90.5, 114.8]), gestational age (β = 0.2 days [-1.1, 1.5]), blood loss (β = -50.6 ml [-107.0, 5.8]), the risks of CD (RR = 0.8; [0.6, 1.1]) or NICU admission (RR = 0.9 [0.5, 1.7]). Trimester of vaccine initiation was also not associated with these outcomes. Our findings suggest that there is no associated risk between prenatal COVID-19 vaccination and adverse delivery and neonatal outcomes in a cohort sample from NYC.     

Understanding COVID-19 vaccination willingness among youth: A survey study in the Netherlands

Vaccination of youth could be key to preventing future outbreaks of SARS-CoV-2. Given the limited direct health benefit for young people, it is important to understand how youth themselves perceive obtaining a vaccination. This survey study in a representative sample of Dutch youth aged 12–18 showed that 73% were willing to get vaccinated against COVID-19. In regression analyses, vaccination willingness was strongly related to age, perceived personal (protect own health) and societal benefits (to get rid of restrictive policies), and their peers’ and parents’ vaccination uptake. Negative associations with vaccination willingness were perceived side-effects and potential unknown long term consequences. On-going and transparent communication with up-to-date information about safety and risks, delivered by independent and trusted experts (as perceived by the recipients) seems important for addressing questions and concerns. Local information sessions for youth and parents where a vaccination can be obtained without appointment could have merit in addition to mass media communication.     

Preferences for COVID-19 vaccination information and location: Associations with vaccine hesitancy,race and ethnicity

This study examined the association between preferences for being informed about the COVID-19 vaccine and where to receive it with vaccination intent and race/ethnicity. We conducted an online survey, oversampling Black and Latino panel members. The 1668 participants were 53.2% female, 34.8% White, 33.3% Black, and 31.8% Latino. Participants who were vaccine hesitant (answered “not sure” or “no” to vaccination intent) were more likely to prefer a conversation with their doctor compared to those who answered “yes” (25.0% and 23.4% vs 7.8%, P < .001, respectively). Among participants who responded “not sure”, 61.8% prefer to be vaccinated at a doctor’s office, compared with 35.2% of those who responded “yes” (P < .001). Preferred location differed by race/ethnicity (P < .001) with 67.6% of Black “not sure” participants preferring a doctor’s office compared to 60.2% of Latino and 54.9% of White “not sure” participants. These findings underscore the need to integrate healthcare providers into COVID-19 vaccination programs.     

Acceptability of COVID-19 vaccine mandates among New York City parents,November 2021

School-based vaccine mandates improve vaccination coverage in children. We conducted a cross-sectional survey of parents in New York City (NYC) in November 2021 to measure acceptability of COVID-19 vaccine mandates for students, and for teachers and school staff. Random address-based sampling was used to recruit parents of children 5–11 years of age. Among 2,506 parents surveyed, 44.3% supported school-based vaccine mandates for students and 69.1% supported mandates for teachers and school staff. Asian parents, male parents, those with higher income, college education, those voting for the 2021 Democratic mayoral candidate and parents from Manhattan were most likely to support vaccine mandates for students. Among all parents, 25.1% said they would not vaccinate their child if required. Our data show only modest support for school-based COVID-19 vaccine mandates for children despite their importance in improving vaccination coverage.     

Hesitation of the Tunisian population to COVID-19 vaccination,and its associated factors

Background: Many people are reluctant to be vaccinated against COVID-19. Aim: To determine the intention to accept COVID19 vaccine and its associated factors among Tunisians. Methods: We conducted a cross-sectional study among Tunisians from December 2020 to January 2021 using an online questionnaire. Factors associated with intention to accept coronavirus vaccine were analysed using multinomial logistic regression. Results: In total, 169 Tunisians participated in our study. The majority were female (85.2%). The mean age was 48.3 ± 11.8 years. Only 33.1% intended to accept to be vaccinated when COVID-19 vaccine will be available in Tunisia and 22.5% were still hesitant. In multinomial logistic regression, participants having high or very high perceived personal risk of COVID-19 infection (aOR:3.257, 95% CI :1.204 – 8.815) were more prone to hesitate to accept COVID-19 vaccine rather than those being willing to accept it. Respondents undergoing seasonal influenza vaccination (aOR: 0.091, 95% CI : 0.019 – 0.433)were less prone to refuse COVID-19 vaccine rather than those being willing to accept it. Young ones aged less than 40 years (aOR: 4.324, 95% CI: 1.180 – 15.843) were more prone to refuse COVID-19 vaccine rather than those being willing to accept it. Conclusion: The acceptance rate of coronavirus vaccination was moderate. Therefore, a good communication and health education at a community level are needed.     

A retrospective analysis of social media posts pertaining to COVID-19 vaccination side effects

ObjectivesWith an uprising influence of social media platforms like Twitter and Instagram a multitude of worldwide accessible information is available. Since the beginning of COVID-19 pandemic the exchange of medical information about several topics related to this infectious disease and its vaccination has increased rapidly. The purpose of this investigation was to assess the content associated with COVID-19 vaccination and its side effects and evaluate its educational quality.MethodsWe conducted this retrospective study to investigate 600 Twitter and Instagram posts by #covidvaccinesideeffects due to number of ‘likes’, comments, type of post, language, its purpose and source. In addition, posts were evaluated due to educational quality by three examiners of different educational levels.ResultsThe majority of posts showed 0 to 50 “likes” and 0 to 5 comments in English language. A comparison between Twitter and Instagram by the influence of application showed significant differences in number of posts and “likes” or comments (p < 0.05). The major post type were texts for Twitter (251; 83.7%) and videos for Instagram (104; 34.7%). While a majority of posts by #covidvaccinesideeffects report about the occurrence of side effects, the majority of them were mild and general COVID-19 vaccination feedback during the first 4 months was positive. But, only 3 to 7% were rated by “excellent” educational and validatable content. Interrater reliability between all three examiners presented a high concordance with 89% (p = 0.001).ConclusionsThis study presents an analysis of quantity and quality of social media content according to COVID-19 vaccinations and its side effects. It supports the deduction that most of the content on Twitter and Instagram is shared by patients and unclear sources and thus is limited informative. Nevertheless, influence of social media on medical information especially during COVID-19 pandemic is increasing and practitioners have to face its effect on their patients.     

UAE efforts in promoting COVID-19 vaccination and building vaccine confidence

The United Arab Emirates (UAE) is leading globally in many indicators for tackling the COVID-19 pandemic. This ranges from taking adequate preventive measures to the free vaccination drive and viable public health strategy. As of 18 August 2021, the UAE has significantly reduced the number of cases and successfully administered 17,454,250 doses. Furthermore, efforts and plans are underway to provide the third dose to high-risk people three months after completing the second dose and six months later to others. The UAE is considered one of the leaders globally for vaccinating “medically eligible” residents against COVID-19, with over 70% of the population currently fully vaccinated in the drive towards achieving herd immunity. The UAE's vaccination program is on track, covering a significant part of the population. The massive efforts of the National Vaccination Program's roll-out made by the UAE government and the various health authorities and stakeholders were vital for the general public's active participation in its success.     

广州市居民新冠疫苗接种犹豫性调查与影响因素分析

目的 调查广州市居民对接种新冠疫苗的犹豫率及其影响因素。方法 在全市范围通过电话号码随机抽样1000例广州市居民,由广州市12320卫生热线于2021年4月中旬对抽取的居民进行电话访问,调查居民对接种新冠疫苗的知识、信念和态度。运用SPSS 20.0软件包,分析广州居民的疫苗接种犹豫状况的分布,并通过多因素logistic回归分析影响疫苗犹豫的相关因素,OR及其95%CI大于1为疫苗犹豫的危险因素。结果 1000位调查对象的平均年龄为（33.90±9.27）岁,男性占44.1%,男女比例为1[DK]∶1.27,疫苗犹豫的调查对象占30.0%。城市居民犹豫率（31.6%）高于农村居民（23.6%）;小学及以下学历者犹豫率（52.2%）高于中学和大学学历者;自评身体健康状况良好和较差者犹豫率均低于自评健康状况中等者（40.4%）;对疫苗作用了解不多者犹豫率（40.2%）高于了解者（26.7%）,其P值皆<0.05。多因素logistic回归分析发现,城市居民（OR=1.469）、低学历（OR=2.800）、自评健康状况中等（OR=1.887）、对疫苗作用了解不多（OR=1.960）、认为疫苗不能有效避免新冠病毒（OR=2.733）、认为身体健康（OR=2.730）、认为国内风险不高（OR=4.749）、认为治疗手段完善（OR=2.652）、认为疫苗存在风险（OR=1.597）、担心疫苗副作用（OR=2.524）、担心疫苗是假冒伪劣或过期产品（OR=1.813）、担心疫苗接种人员操作不规范（OR=1.729）、难预约（OR=1.706）及易受到同事同学（OR=1.353）、家人（OR=1.451）、社交媒体（OR=1.383）疫苗犹豫的影响是导致新冠肺炎疫苗接种犹豫的危险因素(P值皆<0.05)。结论 居民存在对新冠肺炎疫苗接种犹豫的现象,需要通过广泛宣传和健康教育来提升公众对新冠肺炎疫苗的信心,增强公众对新冠肺炎疫苗的接种意识,提高新冠肺炎疫苗接种率。     

Political attitudes and efficacy of health expert communication on the support for COVID-19 vaccination program: Findings from a survey in Hong Kong

Despite evidence suggesting that vaccines offer protection against COVID-19, the uptake rates of COVID-19 vaccines have been low in some high-income regions. Support for vaccination program is important to fight the pandemic. This study aimed at exploring two research questions: first, to what extent political attitudes are associated with support for COVID-19 vaccination program; and second, whether health expert communication is effective in increasing the support. An online survey was undertaken by 1079 Hong Kong residents aged 18–77 years from May 26 to June 3, 2021. The survey found higher support in pro-government respondents, and lower support in political opposition. A strategy of positive communication by health experts could increase support in the opposition and politically attentive respondents. Other variables that were positively related to program support were quarantine experience, trust in government, preference for pandemic control over freedom, political attentiveness, and disagreement with China’s influence on Hong Kong’s COVID-19 policymaking. This study contributes to understanding the relationship between political attitudes and support for vaccination program and provides empirical evidence of the efficacy of health expert communication strategy in improving support for vaccination program for people with certain political attitudes.     

Impact of COVID-19 vaccination in post-COVID cardiac complications

BackgroundAfter the acute infection, COVID-19 can produce cardiac complications as well as long-COVID persistent symptoms. Although vaccination against COVID-19 represented a clear reduction in both mortality and ICU admissions, there is very little information on whether this was accompanied by a decrease in the prevalence of post-COVID cardiac complications. The aim of this study was to analyze the relationship between COVID-19 vaccination and the prevalence of post-COVID cardiac injury assessed by echocardiogram, and long-COVID persistent cardiac symptoms. Methods: All patients who consulted for post-COVID evaluation 14 days after discharge from acute illness were included. Patients with heart disease were excluded. The relationship between complete vaccination scheme (at least two doses applied with 14 days or more since the last dose) and pathological echocardiographic findings, as well as the relationship of vaccination with persistent long-COVID symptoms, were evaluated by multivariate analysis, adjusting for age, sex and clinical variables that would have shown significant differences in univariate analysis. Results: From 1883 patients, 1070 patients (56.8%) suffered acute COVID-19 without a complete vaccination scheme. Vaccination was associated with lower prevalence of cardiac injury (1.35% versus 4.11%, adjusted OR 0.33; 95% CI 0.17–0.65, p=0.01). In addition, vaccinated group had a lower prevalence of persistent long-COVID symptoms compared to unvaccinated patients (10.7% versus 18.3%, adjusted OR 0.52; 95% CI 0.40–0.69, p<0.001). Conclusion: Vaccination against COVID-19 was associated with lower post-COVID cardiac complications and symptoms, reinforcing the importance of fully vaccinating the population.     

COVID-19疫情下肺结核病人的COVID-19疫苗接种策略

COVID-19疫情流行形势依旧严峻,对于疫苗的普及接种刻不容缓。肺结核是中国高发的慢性传染病,由于病发肺部,肺结核患者合并感染COVID-19之后病情更重,治疗效果差。而目前对于肺结核患者接种COVID-19疫苗的保护效力、免疫原性及安全性仍知之甚少,也缺乏相应的循证医学证据。本文回顾了肺结核的发病机制与流行病学,探讨了肺结核患者体内的免疫状态,对目前国内外已有的对肺结核患者疫苗接种的提议进行了总结,同时结合其他特殊人群已有的疫苗接种的临床研究进行分析,探讨了COVID-19疫情下肺结核病人的疫苗接种策略和开展以肺结核患者为目标人群的COVID-19疫苗临床研究的必要性。     

Unravelling the drivers behind COVID-19 vaccination hesitancy and refusal among teachers: A nationwide study

This study aims to assess the determinants of the coronavirus disease 2019 (COVID-19) vaccination hesitancy and refusal (VHR) among teachers, from pre-school to higher education, through an online survey. A logistic regression analysis was used to determine the adjusted odds ratio (OR) of the independent variables (perceptions, knowledge, and attitudes) per 1-point increase in the Likert scale, and VHR.Concerns about the vaccines’ efficacy and safety increase the risk of VHR (OR = 6.97, 95 %CI: 4.82–10.09 and OR = 8.71, 95 %CI: 5.52–13.73, respectively). Higher risk perceptions of getting infected (1/OR = 3.94, 95 %CI: 2.93–5.29), trust in the effectiveness of vaccines in reducing this risk or protecting against suffering complications (OR = 3.52, 95 %CI: 2.72–4.55 and OR = 10.94, 95 %CI: 7.16–16.68, respectively), and higher trust levels on the information transmitted regarding COVID-19 vaccination, are associated to lower VHR.As VHR appears to be highly influenced by perceptions, knowledge, and attitudes, it is crucial to promote and design interventions targeted to transforming these determinants.     

COVID-19 vaccine confidence and reasons for vaccination among health care workers and household members

BackgroundThe majority of healthcare workers (HCW) in the US report being fully vaccinated against COVID-19, yet little is known about vaccine decision-making for their household members, including children.MethodsCross-sectional survey July–August 2021 of HCW and their household members in Minnesota.Results94 % of eligible participants were vaccinated with the most common reasons being wanting to protect oneself, family and loved ones. Safety concerns were the most commonly reported reasons for not being vaccinated; a significantly higher proportion of unvaccinated compared to vaccinated HCW (58 % vs 12 %, p = 0.0035) and household adults (25 % vs 5 %, p = 0.03) reported prior SARS-CoV-2 infection. Nearly half of unvaccinated adults and two-thirds of unvaccinated children would be vaccinated if a vaccine mandate were in place.ConclusionsDespite high COVID-19 vaccine acceptance among HCWs, more research is required to identify and address the needs and concerns of healthcare workers who decline COVID-19 vaccination despite availability.