Likelihood of COVID-19 Vaccination Among Individuals Living With Psoriatic Disease: Results From a Large Real-World Survey

Introduction: Development and dissemination of novel COVID-19 vaccines represent an opportunity to end the COVID-19 pandemic by vaccinating an estimated 80% of the population. Objectives: This study examines perceptions, and demographic and clinical factors influencing the likelihood of adults with psoriasis receiving a novel COVID-19 vaccine. Methods: A cross sectional study conducted from October–November 2020 of 1405 adults with psoriatic disease with prior contact to a patient advocacy organization. The main outcome of interest was the likelihood of receiving a COVID-19 vaccine. Chi-square tests and logistic regression examined the relationship between individual characteristics and likelihood of receiving a COVID-19 vaccine. Results: Most participants (65%) received a flu vaccination in the last 12 months and were (64.2%) likely to receive a COVID-19 vaccine, while 35.9% reported being unlikely receive a vaccine. Likelihood of COVID-19 vaccination was associated with receiving the flu vaccine, race, ethnicity, sex, BMI, age, income, severity of PsO and PsA. When controlling for ethnicity, race, male sex, overweight/obese status, age, biologic use, disease type, comorbidities linked with worse COVID-19 outcomes, PsA symptoms, and skin disease severity, individuals who received the flu vaccine and those with annual household income over $75,000 were most likely to receive a COVID-19 vaccine. Conclusions: Vaccine hesitancy among individuals with psoriatic disease is considerable. Dermatologists and rheumatologists can increase COVID-19 vaccine uptake by actively engaging their patients on this topic using guidance published by the National Psoriasis Foundation on the management of psoriatic disease during the COVID-19 pandemic.

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Hesitancy in COVID-19 vaccine uptake and its associated factors among the general adult population: a cross-sectional study in six Southeast Asian countries

Tropical Medicine and Health ◽

10.1186/s41182-021-00393-1 ◽

2022 ◽

Vol 50 (1) ◽

Author(s):

Roy Rillera Marzo ◽

Waqas Sami ◽

Md. Zakiul Alam ◽

Swosti Acharya ◽

Kittisak Jermsittiparsert ◽

...

Keyword(s):

Cross Sectional Study ◽

Southeast Asian ◽

Vaccine Uptake ◽

Vaccine Hesitancy ◽

Sectional Study ◽

Asian Countries ◽

Cross Sectional ◽

Factors Associated ◽

To Receive ◽

Southeast Asian Countries

Abstract Background Vaccines are effective and reliable public health interventions against viral outbreaks and pandemics. However, hesitancy regarding the Coronavirus disease (COVID-19) vaccine is evident worldwide. Therefore, understanding vaccination-related behavior is critical in expanding the vaccine coverage to flatten the infection curve. This study explores the public perception regarding COVID-19 vaccination and identifies factors associated with vaccine hesitancy among the general adult populations in six Southeast Asian countries. Methods Using a snowball sampling approach, we conducted a descriptive cross-sectional study among 5260 participants in Indonesia, Malaysia, Myanmar, Philippines, Thailand, and Vietnam between February and May 2021. Binary logistic regression analysis with a backward conditional approach was applied to identify factors associated with COVID-19 vaccine hesitancy. Results Of the total, 50.6% were female, and the median age was 30 years (range: 15–83 years). The majority of the participants believed that vaccination effectively prevents and controls COVID-19 (81.2%), and 84.0% would accept COVID-19 vaccines when they become available. They agreed that health providers’ advice (83.0%), vaccination convenience (75.6%), and vaccine costs (62.8%) are essential for people to decide whether to accept COVID-19 vaccines. About half (49.3%) expressed their hesitancy to receive the COVID-19 vaccines. After adjustment for other covariates, COVID-19 vaccine hesitancy was significantly associated with age, residential area, education levels, employment status, and family economic status. Participants from Indonesia, Myanmar, Thailand, and Vietnam were significantly more likely to express hesitancy in receiving COVID-19 vaccines than those from Philippines. Conclusions In general, participants in this multi-country study showed their optimistic perception of COVID-19 vaccines’ effectiveness and willingness to receive them. However, about half of them still expressed their hesitancy in getting vaccinated. The hesitation was associated with several socioeconomic factors and varied by country. Therefore, COVID-19 vaccination programs should consider these factors essential for increasing vaccine uptake in the populations.

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SARS-CoV-2: Vaccine Hesitancy among Underrepresented Racial and Ethnic Groups with HIV in Miami, Florida

Open Forum Infectious Diseases ◽

10.1093/ofid/ofab154 ◽

2021 ◽

Author(s):

Deborah L Jones ◽

Ana S Salazar ◽

Violeta J Rodriguez ◽

Raymond R Balise ◽

Claudia Uribe Starita ◽

...

Keyword(s):

Race And Ethnicity ◽

Cross Sectional Study ◽

Vaccine Uptake ◽

Vaccine Hesitancy ◽

Baseline Survey ◽

Advisory Group ◽

Medical Mistrust ◽

Cross Sectional ◽

Exact Test ◽

Novel Coronavirus

Abstract Background SARS-CoV-2 and HIV disproportionally affect underrepresented ethnoracial groups in the US. Medical mistrust and vaccine hesitancy will likely impact acceptability of SARS-CoV-2 vaccines. This study examined SARS-CoV-2 vaccine hesitancy among underrepresented ethnoracial groups with HIV and identified factors that may reduce vaccine uptake. Methods We conducted a cross-sectional study of adults ≥18 years with HIV residing in Miami, FL. Participants were invited to participate in the ACTION (A Comprehensive Translational Initiative on Novel Coronavirus) cohort study. A baseline survey was administered from April-August 2020 and followed by a COVID-19 vaccine hesitancy survey from August-November 2020. The COVID-19 vaccine hesitancy survey was adapted from the Strategic Advisory Group Experts survey. Comparisons by race and ethnicity were performed using the Freedman-Haltmann extension of Fisher’s exact test Results A total of 94 participants were enrolled, mean age 54.4 years, 52% female, 60% Black non-Latinx, and 40% non-Black Latinx. Black non-Latinx participants were less likely to agree that vaccinations are important for health when compared to non-Black Latinx (67.8% vs 92.1%, p=0.009), less likely to agree that vaccines are effective in preventing disease (67.8% vs 84.2%, p=0.029), less likely to believe that vaccine information is reliable and trustworthy (35.7% vs 71.1%, p=0.002), and less likely to believe vaccines were unnecessary because COVID-19 would disappear soon (11% vs 21%, p=0.049). Conclusion Medical mistrust, vaccine hesitancy and negative sentiments about SARS-CoV-2 vaccines are prevalent among underrepresented ethnoracial groups with HIV, particularly Black non-Latinx. Targeted strategies to increase vaccine uptake in this population are warranted.

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Willingness to Receive the COVID-19 and Seasonal Influenza Vaccines among the Saudi Population and Vaccine Uptake During the Initial Stage of the National Vaccination Campaign: A Cross-Sectional Survey

Vaccines ◽

10.3390/vaccines9070765 ◽

2021 ◽

Vol 9 (7) ◽

pp. 765

Author(s):

Amel Ahmed Fayed ◽

Abeer Salem Al Shahrani ◽

Leenah Tawfiq Almanea ◽

Nardeen Ibrahim Alsweed ◽

Layla Mohammed Almarzoug ◽

...

Keyword(s):

Saudi Arabia ◽

Perceived Risk ◽

Online Survey ◽

Seasonal Influenza ◽

Vaccination Campaign ◽

Vaccine Uptake ◽

Influenza Vaccines ◽

Vaccine Hesitancy ◽

Cross Sectional ◽

To Receive

This study aimed to assess the willingness to receive the coronavirus disease 2019 (COVID-19) and seasonal influenza vaccines and vaccine uptake during the early stage of the national vaccination campaign in Saudi Arabia. A cross-sectional online survey was conducted among adult Saudis between 20 January and 20 March 2021. The questionnaire addressed vaccine hesitancy, perceived risk, willingness, and vaccine uptake. Approximately 39% of the participants expressed vaccine hesitancy, and 29.8% and 24% felt highly vulnerable to contracting COVID-19 and seasonal influenza, respectively. The majority (59.5%) were willing to receive the COVID-19 vaccine, although only 31.7% were willing to receive the flu vaccine. Adjusted analysis showed that vaccine hesitancy (OR 0.34, 95% CI 0.27–0.43) and the perception of being at high risk (OR 2.78, 95% CI 1.68–4.60) independently affected the intention to be vaccinated. Vaccine hesitancy was similar among those who were willing to be vaccinated (29.8%) and those who had already been vaccinated (33.1%). The perceived risk was significantly higher among those who had been vaccinated (48.1%) than among those who were willing to be vaccinated but had not yet been vaccinated (29.1%). In conclusion, the acceptance of the COVID-19 vaccine in Saudi Arabia is high. Saudis who received the vaccine had a similar level of vaccine hesitancy and a higher level of perceived risk.

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Adenovirus and RNA-based COVID-19 vaccines’ perceptions and acceptance among healthcare workers in Saudi Arabia: a national survey

BMJ Open ◽

10.1136/bmjopen-2020-048586 ◽

2021 ◽

Vol 11 (6) ◽

pp. e048586

Author(s):

Mohamad-Hani Temsah ◽

Mazin Barry ◽

Fadi Aljamaan ◽

Abdullah Alhuzaimi ◽

Ayman Al-Eyadhy ◽

...

Keyword(s):

Saudi Arabia ◽

Healthcare Workers ◽

Online Survey ◽

Healthcare Providers ◽

Vaccine Uptake ◽

Vaccine Hesitancy ◽

Cross Sectional ◽

Validated Questionnaire ◽

Vectored Vaccine ◽

To Receive

ObjectivesThe aim of this study was to compare the perception, confidence, hesitancy and acceptance rate of various COVID-19 vaccine types among healthcare workers (HCWs) in Saudi Arabia, a nation with Middle East respiratory syndrome coronavirus experience.DesignNational cross-sectional, pilot-validated questionnaire.SettingOnline, self-administered questionnaire among HCWs.ParticipantsA total of 2007 HCWs working in the Kingdom of Saudi Arabia participated; 1512 (75.3%) participants completed the survey and were included in the analysis.InterventionData were collected through an online survey sent to HCWs during 1–15 November 2020. The main outcome measure was HCW acceptance of COVID-19 candidate vaccines. The associated factors of vaccination acceptance were identified through a logistic regression analysis and via measurement of the level of anxiety, using the Generalised Anxiety Disorder 7 scale.ResultsAmong the 1512 HCWs who were included, 62.4% were women, 70.3% were between 21 and 40 years of age, and the majority (62.2%) were from tertiary hospitals. In addition, 59.5% reported knowing about at least one vaccine; 24.4% of the participants were sure about their willingness to receive the ChAdOx1 nCoV-19 vaccine, and 20.9% were willing to receive the RNA BNT162b2 vaccine. However, 18.3% reported that they would refuse to receive the Ad5-vectored vaccine, and 17.9% would refuse the Gam-COVID-Vac vaccine. Factors that influenced the differential readiness of HCWs included their perceptions of the vaccine’s efficiency in preventing the infection (33%), their personal preferences (29%) and the vaccine’s manufacturing country (28.6%).ConclusionsAwareness by HCWs of the several COVID-19 candidate vaccines could improve their perceptions and acceptance of vaccination. Reliable sources on vaccine efficiency could improve vaccine uptake, so healthcare authorities should use reliable information to decrease vaccine hesitancy among frontline healthcare providers.

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Acceptance Rates and Beliefs toward COVID-19 Vaccination among the General Population of Pakistan: A Cross-Sectional Survey

American Journal of Tropical Medicine and Hygiene ◽

10.4269/ajtmh.21-0297 ◽

2021 ◽

Author(s):

Farah Yasmin ◽

Waleed Asghar ◽

Maryam Salma Babar ◽

Hiba Khan ◽

Shoaib Ahmad ◽

...

Keyword(s):

General Population ◽

Cross Sectional Study ◽

Vaccine Hesitancy ◽

Cross Sectional Survey ◽

Cross Sectional ◽

The Public ◽

Polio Vaccination ◽

Acceptance Rates ◽

To Receive ◽

Do So

Developing countries like Pakistan have previously suffered from barriers to acceptance of vaccination by the public because of financial and belief barriers. This study aims to explore these beliefs and highlight concerns regarding vaccine hesitancy in the general population of Pakistan since they are a hindrance to an effective coronavirus disease-19 (COVID-19) immunization in the country. A cross-sectional study was performed involving 1,778 participants from all four provinces of Pakistan. Results from the study showed more than half of the participants to be unsure of the safety (50%) and efficacy (51%) of the vaccine, whereas 42% were concerned about the side effects of the vaccine. About 72% of the respondents planned to get vaccinated, whereas 28% refused to do so. Internationally made imported vaccines were more trusted by the participants. Forty-four percent of the participants agreed to receive the vaccine upon recommendation from a physician. Lastly, participants who believed in the efficacy of the polio vaccination also considered the COVID-19 vaccine to be safe and effective.

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Willingness to Accept COVID-19 Vaccine and Its Determinants among Nigeria Citizens: A Web-based Cross-sectional Study

Journal of Advances in Medicine and Medical Research ◽

10.9734/jammr/2021/v33i830881 ◽

2021 ◽

pp. 13-22

Author(s):

Olanrewaju Davies Eniade ◽

Abayomi Olarinmoye ◽

Agofure Otovwe ◽

Funke E. Akintunde ◽

Omowumi O. Okedare ◽

...

Keyword(s):

Binary Logistic Regression ◽

Cross Sectional Study ◽

Outcome Variable ◽

Willingness To Accept ◽

Sectional Study ◽

Chi Square ◽

Cross Sectional ◽

Other Information ◽

Level Of Significance ◽

To Receive

Background: The peculiarity in Nigerians’ demographic, socio-economic and cultural pattern necessitated the need to explore potential COVID-19 vaccine acceptance. This study investigated the determinants of willingness to receive COVID-19 vaccine in Nigeria. Methods: An online cross-sectional study among the general population in Nigeria. Data were collected using an electronic questionnaire. A total of 368 individuals participated in the research. The outcome variable was willingness to accept COVID-19 vaccine coded as “Yes=1 and No=0.” Basic socio-demographic information of participants and other information related to COVID-19 were obtained. Stata MP 14 was used for the statistical analysis. Descriptive statistics were presented, test of association were carried out using chi square and a binary logistic regression was used to assess the determinants of willingness to accept COVID-19 vaccine. All analyses were performed at 5% level of significance. Results: The mean age of the respondents was 29.4 + 9.65 years. Majority of the study participants were female (58.9%), Yoruba (74.7%) and dwellers of urban area (68.5%). Also, 85.6% have attained tertiary level of education. Two-fifth (40.5%) of respondent reported their willingness to take the COVID-19 if made available. Majority (69.8%) of those that are willing to take the vaccine would prefer a live attenuated form and 39.6% would prefer the vaccine administered intramuscularly. Age group≥40 years (AOR: 5.20, CI: 1.02- 26.41), currently married (AOR: 2.81, CI: 1.05 – 7.53) and susceptibility to COVID 19 infection (AOR: 2.52, CI: 1.21 – 5.26) were associated with likelihood of willingness to accept COVID-19 vaccine. Conclusion: Despite the fact that majority were at risk of COVID-19 infection, willingness to receive COVID-19 vaccine was low among Nigerians. Level of maturity in terms of age and marriage as well as susceptibility to COVID-19 infection increased the likelihood of accepting COVID-19 infection. In Furtherance, younger ones, unmarried and non-susceptible individual may require more efforts tailored towards enrichment of understanding about the importance of COVID-19 vaccine in other to improve the acceptance of COVID-19 vaccine in Nigeria.

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1172. SARS-CoV-2 Vaccine Hesitancy in Caregivers of Hospitalized Children

Open Forum Infectious Diseases ◽

10.1093/ofid/ofab466.1365 ◽

2021 ◽

Vol 8 (Supplement_1) ◽

pp. S677-S677

Author(s):

Marisa Orbea ◽

Rachel Cunningham ◽

C Mary Healy ◽

Julie A Boom ◽

Claire Bocchini

Keyword(s):

Vaccine Uptake ◽

Vaccine Hesitancy ◽

Hospitalized Children ◽

Parent Attitudes ◽

Cross Sectional Survey ◽

Cross Sectional ◽

Vaccine Acceptance ◽

And Behaviors ◽

Childhood Vaccines ◽

To Receive

Abstract Background SARS-CoV-2 vaccine hesitancy (VH) is hindering nationwide vaccination efforts; little is known about caregiver SARS-CoV-2 vaccine acceptance for children. We aimed to identify associations with SARS-CoV-2 VH in caregivers of hospitalized children. Methods We conducted a prospective cross-sectional survey in English and Spanish of caregiver COVID-19 knowledge, attitudes, behaviors, and associated VH among hospitalized children 6 months - 18 years at a large pediatric medical institution. Parents were approached daily, averaging 4-5 days/week, from 12/8/2020--4/5/2021. VH was assessed using the Parent Attitudes about Childhood Vaccines (PACV) survey; PACV score ≥50 denoted VH. Descriptive statistics and multivariable logistic regression were used. Responses were categorized. Results 295/307 (96%) of approached caregivers enrolled; 79% were ≥ 30 years, 68% were married/ living with a partner, and 57% had at least some college. 36% identified as white, 19% Black, and 46% Hispanic/ Latino. 53% of caregiver children had public insurance. 91% of caregivers self-reported their children were up to date with routine vaccines. 17% of caregivers were vaccine-hesitant overall. 50% of caregivers were willing to receive COVID-19 vaccine themselves. Figure 1 shows intention to vaccinate their child by PACV score. 65% knew someone who was hospitalized for COVID-19. 67% were scared of their child getting COVID-19. However, 49% were scared of their child getting the vaccine, 28% did not want to vaccinate their child and 27% were neutral in the intention to vaccinate their child. Caregivers who did not intend to vaccinate their child were more likely to be Black (27% vs. 16%, p=0.04) and less likely to be Hispanic/ Latino (33% vs. 49%, p=0.02). Table 1 shows attitudes, beliefs, and behaviors surrounding the COVID-19 pandemic and vaccine in caregivers who did or did not intend to vaccinate their child. Figure 1 COVID-19 vaccine uptake by PACV score Table 1 Caregiver attitudes, beliefs, and behaviors surrounding the COVID-19 pandemic and the COVID-19 vaccine Conclusion The majority of caregivers believe that SARS-CoV-2 vaccine will help control the pandemic, but less than half plan to vaccinate their children. A quarter of caregivers expressed uncertainty regarding the vaccine and therefore may be amenable to education and discussion. COVID-19 VH is different from VH towards routine vaccinations. More research is needed to address COVID-19 specific VH. Disclosures C. Mary Healy, MD, Dexcom (Shareholder)Intuitive (Shareholder)Quidel Corporation (Shareholder)Up to Date (Other Financial or Material Support, Honorarium)Vapotherm (Shareholder)

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Myths, beliefs, and conspiracies about COVID-19 Vaccines in Sindh, Pakistan: An online cross-sectional survey

10.22541/au.161519250.03425961/v1 ◽

2021 ◽

Author(s):

Qamar Abbas ◽

Fatima Mangrio ◽

Sunil Kumar

Keyword(s):

Side Effects ◽

Cross Sectional Study ◽

Vaccine Uptake ◽

Cross Sectional Survey ◽

Chi Square ◽

Cross Sectional ◽

Web Based ◽

Major Barrier ◽

Polio Vaccination ◽

Relationship Of

Abstract Background Pakistan has already encountered intense opposition to polio vaccination due to myths and misinformation, now the unfavorable opinions of COVID-19 vaccinations among the population would have catastrophic consequences for attempts to end the pandemic. Methods A web-based cross-sectional study was conducted in the general population of Sindh, Pakistan in January 2021. 31 items based on vaccines availability, safety, and myths, the questionnaire was designed and randomly distributed through a google form link. Results were analyzed using descriptive and Chi-square tests. Results A total of 774 responses were recorded from 23 districts of Sindh, Pakistan. The majority of participants (n=00, 00.0%) were not aware of the presence of the COVID-19 vaccine in Pakistan. Results found the significant relationship of conspiracies and myths with an education level of participants, to make Muslims infertile, illiterate showed (Yes n=45, No=27) while postgraduate (Yes n=11, No=88) (χ2 = 109.6, P> 0.000). Participants showed doubt about the safety of vaccines, (Yes n= 464, 59.9%, No= 310, 40.1%). Other responses related to side effects of the vaccine were also highly significant, participants showed that vaccine side effects (Yes n= 462, 59.7%, No= 312, 40.3%), Pregnant or breastfeeding women should not get vaccinated (Yes n= 468, 59.8%, No= 311, 40.1%) and people with underlying conditions should not get vaccinated (True n= 389, 50.3%, False= 385, 49.7%). Conclusion The proportion of varying public doubts in vaccines’ safety and efficacy and the presence of myths, conspiracies will be a major barrier to vaccine uptake.

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Willingness, beliefs, and barriers regarding the COVID-19 vaccine in Saudi Arabia: a multiregional cross-sectional study

BMC Family Practice ◽

10.1186/s12875-021-01606-6 ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Noura Altulahi ◽

Shouq AlNujaim ◽

Azzam Alabdulqader ◽

Abdullah Alkharashi ◽

Assaf AlMalki ◽

...

Keyword(s):

Saudi Arabia ◽

Herd Immunity ◽

Vaccine Safety ◽

Cross Sectional Study ◽

Vaccine Uptake ◽

Vaccine Hesitancy ◽

Considerable Proportion ◽

Cross Sectional ◽

High School Degree ◽

Validated Questionnaire

Abstract Background The coronavirus disease 2019 (COVID-19) has spread worldwide, and the vaccine remains the ultimate cornerstone to overcoming its long-term impact. Vaccine hesitancy might obstruct the effort to achieve herd immunity and eradicate the virus. We assessed Saudi Arabian individuals’ willingness, beliefs, and barriers regarding the COVID-19 vaccine and their adherence to preventive measures during and after the pandemic. Methods A self-administered electronic validated questionnaire was distributed among the five major regions in Saudi Arabia between November and December 2020. The questionnaire addressed the sociodemographic data, beliefs, potential barriers, parents’ acceptance of COVID-19 vaccination for their children, and adherence to protective measures during and after the pandemic. Results Of 8,056 participants, 4,218 (52.4%) of a non-representative sample were willing to be vaccinated against COVID-19. Being a young adult, male, having less than a high school degree, being a smoker, having a chronic disease, and having a history of seasonal influenza vaccine uptake were positive predictors of COVID-19 vaccine acceptance. Hesitant participants reported concerns about vaccine side effects and safety as the main barriers to accepting the COVID-19 vaccine. Some refusers (26.1%) declared that they would reconsider vaccination only if the safety and effectiveness of the vaccine were reported by more studies. Conclusions Our study revealed a promising willingness to accept the vaccine among the population, with positive beliefs and attitudes toward COVID-19 vaccination. However, a considerable proportion of the population was reluctant to accept the vaccine. Thus, publicly providing information about vaccine safety and implementing health education programs is crucial for increasing the public’s confidence in the vaccine.

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Corowa-kun: Impact of a COVID-19 vaccine information chatbot on vaccine hesitancy, Japan 2021

10.1101/2021.05.26.21257854 ◽

2021 ◽

Author(s):

Takaaki Kobayashi ◽

Yuka Nishina ◽

Hana Tomoi ◽

Ko Harada ◽

Kyuto Tanaka ◽

...

Keyword(s):

Vaccine Hesitancy ◽

Cross Sectional Survey ◽

Confidential Interval ◽

Cross Sectional ◽

Vaccine Acceptance ◽

Factors Associated ◽

History Of ◽

Flu Vaccine ◽

Vaccine Information ◽

To Receive

Background: Few studies have assessed how mobile messenger apps affect COVID-19 vaccine hesitancy. We created a COVID-19 vaccine information chatbot in a popular messenger app in Japan to answer commonly asked questions. Methods: LINE is the most popular messenger app in Japan. Corowa-kun, a free chatbot, was created in LINE on February 6, 2021. Corowa-kun provides instant, automated answers to frequently asked COVID-19 vaccine questions. In addition, a cross-sectional survey assessing COVID-19 vaccine hesitancy was conducted via Corowa-kun during April 5 to 12, 2021. Results: A total of 59,676 persons used Corowa-kun during February to April 2021. Of them, 10,192 users (17%) participated in the survey. Median age was 55 years (range 16 to 97), and most were female (74%). Intention to receive a COVID-19 vaccine increased from 59% to 80% after using Corowa-kun (p < 0.01). Overall, 20% remained hesitant: 16% (1,675) were unsure, and 4% (364) did not intend to be vaccinated. Factors associated with vaccine hesitancy were: age 16 to 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 another 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. Conclusions: Corowa-kun reduced vaccine hesitancy by providing COVID-19 vaccine information in a messenger app. Mobile messenger apps could be leveraged to increase COVID-19 vaccine acceptance.

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