Corowa-kun: A messenger app chatbot delivers COVID-19 vaccine information,Japan 2021 |
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| Institution: | 1. Division of Infectious Diseases, Department of Internal Medicine, University of Iowa Hospitals & Clinics, Iowa City, IA, USA;2. Department of General Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan;3. Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, Keppel Street, London, UK;4. Department of Medicine, Icahn School of Medicine at Mount Sinai, Mount Sinai Beth Israel, New York, NY, USA;5. Department of Respiratory Medicine, Nippon Koukan Hospital, Kawasaki, Kanagawa, Japan;6. Department of Pediatrics, Jikei University Katsushika Medical Center, Tokyo, Japan;7. Department of Bioengineering, Imperial College London, London, United Kingdom;8. Department of General Internal Medicine, Saitama Medical University Hospital, Moroyama, Saitama, Japan;9. Department of Obstetrics and Gynecology, Kanto Central Hospital, Tokyo, Japan;10. Department of Oncology, Kameda Medical Center, Kamogawa, Chiba, Japan;11. Brookdale Department of Geriatrics and Palliative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA |
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| Abstract: | BackgroundThere is a long history in Japan of public concerns about vaccine adverse events. Few studies have assessed how mobile messenger apps affect COVID-19 vaccine hesitancy.MethodsCorowa-kun, a free chatbot, was created on February 6, 2021 in LINE, the most popular messenger app in Japan. Corowa-kun provides instant, automated answers to 70 frequently asked COVID-19 vaccine questions. A cross-sectional survey with 21 questions was performed within Corowa-kun during April 5–12, 2021.ResultsA total of 59,676 persons used Corowa-kun during February–April 2021. Of them, 10,192 users (17%) participated in the survey. Median age was 55 years (range 16–97), and most were female (74%). COVID-19 vaccine hesitancy reported by survey respondents decreased from 41% to 20% after using Corowa-kun. Of the 20% who remained hesitant, 16% (1,675) were unsure, and 4% (3 6 4) did not intend to be vaccinated. Factors associated with vaccine hesitancy were: age 16–34 (odds ratio OR] = 3.7; 95% confidential interval CI]: 3.0–4.6, compared to age ≥ 65), female sex (OR = 2.4; Cl: 2.1–2.8), and history of a previous vaccine side-effect (OR = 2.5; Cl: 2.2–2.9). Being a physician (OR = 0.2; Cl: 0.1–0.4) and having received a flu vaccine the prior season (OR = 0.4; Cl: 0.3–0.4) were protective.ConclusionsA substantial number of people used the chabot in a short period. Mobile messenger apps could be leveraged to provide accurate vaccine information and to investigate vaccine intention and risk factors for vaccine hesitancy. |
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