Readability assessment of vaccine information: a systematic review for addressing vaccine hesitancy

2021 ◽  
Author(s):  
Tsuyoshi Okuhara ◽  
Hirono Ishikawa ◽  
Haruka Ueno ◽  
Hiroko Okada ◽  
Mio Kato ◽  
...  
Keyword(s):  
Systematic Review ◽  
Vaccine Hesitancy ◽  
Vaccine Information ◽  
Readability Assessment

scholarly journals Faster than warp speed: early attention to COVD-19 by anti-vaccine groups on Facebook

2021 ◽  
Author(s):  
Seth C Kalichman ◽  
Lisa A Eaton ◽  
Valerie A Earnshaw ◽  
Natalie Brousseau
Keyword(s):  
Social Media ◽  
Vaccine Development ◽  
Rapid Development ◽  
Development Program ◽  
Vaccine Safety ◽  
Vaccine Hesitancy ◽  
Conspiracy Theories ◽  
The Us ◽  
Us Government ◽  
Vaccine Information

Abstract Background The unprecedented rapid development of COVID-19 vaccines has faced SARS-CoV- (COVID-19) vaccine hesitancy, which is partially fueled by the misinformation and conspiracy theories propagated by anti-vaccine groups on social media. Research is needed to better understand the early COVID-19 anti-vaccine activities on social media. Methods This study chronicles the social media posts concerning COVID-19 and COVID-19 vaccines by leading anti-vaccine groups (Dr Tenpenny on Vaccines, the National Vaccine Information Center [NVIC] the Vaccination Information Network [VINE]) and Vaccine Machine in the early months of the COVID-19 pandemic (February–May 2020). Results Analysis of 2060 Facebook posts showed that anti-vaccine groups were discussing COVID-19 in the first week of February 2020 and were specifically discussing COVID-19 vaccines by mid-February 2020. COVID-19 posts by NVIC were more widely disseminated and showed greater influence than non-COVID-19 posts. Early COVID-19 posts concerned mistrust of vaccine safety and conspiracy theories. Conclusion Major anti-vaccine groups were sowing seeds of doubt on Facebook weeks before the US government launched its vaccine development program ‘Operation Warp Speed’. Early anti-vaccine misinformation campaigns outpaced public health messaging and hampered the rollout of COVID-19 vaccines.

scholarly journals Understanding the determinants of vaccine hesitancy and vaccine confidence among adolescents: a systematic review

2021 ◽  
pp. 1-17
Author(s):  
Chiara Cadeddu ◽  
Carolina Castagna ◽  
Martina Sapienza ◽  
Teresa Eleonora Lanza ◽  
Rosaria Messina ◽  
...  
Keyword(s):  
Systematic Review ◽  
Vaccine Hesitancy ◽  
Vaccine Confidence

scholarly journals Determinants of influenza vaccine hesitancy among pregnant women in Europe: a systematic review

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Gbadebo Collins Adeyanju ◽  
Elena Engel ◽  
Laura Koch ◽  
Tabea Ranzinger ◽  
Imtiaz Bin Mohammed Shahid ◽  
...  
Keyword(s):  
Systematic Review ◽  
Influenza Vaccine ◽  
Influenza Vaccination ◽  
Pregnant Women ◽  
Healthcare Providers ◽  
Primary Objective ◽  
World Health ◽  
Vaccine Hesitancy ◽  
Cochrane Central Register ◽  
Adequate Knowledge

Abstract Background Pregnant women are at high risk for severe influenza. However, maternal influenza vaccination uptake in most World Health Organization (WHO) European Region countries remains low, despite the presence of widespread national recommendations. An influenza vaccination reduces influenza-associated morbidity and mortality in pregnancy, as well as providing newborns with protection in their first months. Potential determinants of vaccine hesitancy need to be identified to develop strategies that can increase vaccine acceptance and uptake among pregnant women. The primary objective of the systematic review is to identify the individual determinants of influenza vaccine hesitancy among pregnant women in Europe, and how to overcome the hesitancy. Methods Databases were searched for peer-reviewed qualitative and quantitative studies published between 2009 and 2019 inclusive. Databases included PubMed via MEDLINE, Cochrane Central Register for Controlled Trials, PsycINFO, SAGE Journals, Taylor and Francis and Springer nature. These covered themes including psychology, medicine, and public health. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach, 11 studies were eligible and analyzed for significant determinants of influenza vaccine hesitancy among pregnant women in Europe. Results The most commonly reported factors were psychological aspects, for example concerns about safety and risks to mother and child, or general low risk perception of becoming ill from influenza. Doubts about the effectiveness of the vaccine and a lack of knowledge about this topic were further factors. There was also influence of contextual factors, such as healthcare workers not providing adequate knowledge about the influenza vaccine or the pregnant lady stating their antivaccine sentiment. Conclusion Health promotion that specifically increases knowledge among pregnant women about influenza and vaccination is important, supporting a valid risk judgment by the pregnant lady. The development of new information strategies for dialogue between healthcare providers and pregnant women should form part of this strategy.

What factors influence measles, mumps and rubella vaccine hesitancy among parents? A systematic review

2021 ◽  
Vol 2 (3) ◽  
pp. 143-152
Author(s):  
Jade Stewart ◽  
Lynn Sayer
Keyword(s):  
Systematic Review ◽  
Critical Appraisal ◽  
Parental Knowledge ◽  
Vaccine Hesitancy ◽  
Attitudes And Beliefs ◽  
Rubella Vaccine ◽  
The United Kingdom ◽  
Health Choices ◽  
The Uk ◽  
Free Status

Background The United Kingdom lost its measles free status in 2019 because of an increase in measles cases, resulting from lowered vaccination uptake. Aims This review aims to gather a deeper understanding about parents' health choices for their children related to this vaccination. Methods A systematic review was carried out with a literature search using CINHAL, MEDLINE and OVID databases to identify information published between September 2016 and February 2020. A critical appraisal of seven studies was completed and a mixed methods synthesis was used to explore the results. Results The review identified factors that contribute to a parent's decision to vaccinate their child against measles, mumps and rubella. Five themes emerged: parental knowledge, attitudes and beliefs; safety concerns; specific groups related to religion and natural lifestyles; socioeconomic factors; and the source of health information. Conclusions Ongoing health promotion is required for the UK to work towards regaining its measles free status.

scholarly journals Vaccine hesitancy: evidence from an adverse events following immunization database, and the role of cognitive biases

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hossein Azarpanah ◽  
Mohsen Farhadloo ◽  
Rustam Vahidov ◽  
Louise Pilote
Keyword(s):  
Decision Making ◽  
Adverse Events ◽  
Cognitive Biases ◽  
Vaccine Safety ◽  
Vaccine Hesitancy ◽  
Decision Making Process ◽  
Evidence Based ◽  
Vaccine Acceptance ◽  
Vaccination Decision ◽  
Vaccine Information

Abstract Background Vaccine hesitancy has been a growing challenge for public health in recent decades. Among factors contributing to vaccine hesitancy, concerns regarding vaccine safety and Adverse Events (AEs) play the leading role. Moreover, cognitive biases are critical in connecting such concerns to vaccine hesitancy behaviors, but their role has not been comprehensively studied. In this study, our first objective is to address concerns regarding vaccine AEs to increase vaccine acceptance. Our second objective is to identify the potential cognitive biases connecting vaccine hesitancy concerns to vaccine-hesitant behaviors and identify the mechanism they get triggered in the vaccine decision-making process. Methods First, to mitigate concerns regarding AEs, we quantitatively analyzed the U.S. Vaccine Adverse Event Reporting System (VAERS) from 2011 to 2018 and provided evidence regarding the non-severity of the AEs that can be used as a communicable summary to increase vaccine acceptance. Second, we focused on the vaccination decision-making process. We reviewed cognitive biases and vaccine hesitancy literature to identify the most potential cognitive biases that affect vaccine hesitancy and categorized them adopting the Precaution Adoption Process Model (PAPM). Results Our results show that the top frequent AEs are expected mild reactions like injection site erythema (4.29%), pyrexia (3.66%), and injection site swelling (3.21%). 94.5% of the reports are not serious and the average population-based serious reporting rate over the 8 years was 25.3 reports per 1 million population. We also identified 15 potential cognitive biases that might affect people’s vaccination decision-making and nudge them toward vaccine hesitancy. We categorized these biases based on the factors that trigger them and discussed how they contribute to vaccine hesitancy. Conclusions This paper provided an evidence-based communicable summary of VAERS. As the most trusted sources of vaccine information, health practitioners can use this summary to provide evidence-based vaccine information to vaccine decision-makers (patients/parents) and mitigate concerns over vaccine safety and AEs. In addition, we identified 15 potential cognitive biases that might affect the vaccination decision-making process and nudge people toward vaccine hesitancy. Any plan, intervention, and message to increase vaccination uptake should be modified to decrease the effect of these potential cognitive biases.

scholarly journals Public Willingness and Determinants of COVID-19 Vaccination at the Initial Stage of Mass Vaccination in China

Vaccines ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1172
Author(s):  
Yi-Miao Zhao ◽  
Lin Liu ◽  
Jie Sun ◽  
Wei Yan ◽  
Kai Yuan ◽  
...  
Keyword(s):  
Social Media ◽  
Online Survey ◽  
Multinomial Logistic Regression ◽  
Vaccine Safety ◽  
High Income ◽  
Vaccine Hesitancy ◽  
Depression Symptoms ◽  
Middle Aged ◽  
The Government ◽  
Vaccine Information

The present study assessed the willingness of the general population to receive COVID-19 vaccines and identified factors that influence vaccine hesitancy and resistance. A national online survey was conducted from 29 January 2021 to 26 April 2021 in China. Multinomial logistic regression analyses were conducted to identify factors that influence vaccine hesitancy and resistance. Of the 34,041 participants surveyed, 18,810 (55.3%) were willing to get vaccinated, 13,736 (40.3%) were hesitant, and 1495 (4.4%) were resistant. Rates of vaccine acceptance increased over time, with geographical discrepancies in vaccine hesitancy and resistance between provinces in China. Vaccine safety was the greatest concern expressed by most participants (24,461 [71.9%]), and the major reason for participants’ refusing vaccination (974 [65.2%]). Government agencies (23,131 [68.0%]) and social media (20,967 [61.6%]) were the main sources of COVID-19 vaccine information. Compared with vaccination acceptance, female, young and middle-aged, high income, and perceived low-risk of infection were associated with vaccine hesitancy. Histories of allergic reactions to other vaccines and depression symptoms were related to vaccine resistance. Common factors that influenced vaccine hesitancy and resistance were residing in cities and perceiving less protection with vaccines than with other protective measures. The results indicate that the rate of vaccine resistance is relatively low, but vaccine hesitancy is common. Individuals who are female, young and middle-aged, with a high income, and residing in cities are more likely to be hesitant for vaccination and should be the target populations for vaccination campaigns. Specific vaccine messaging from the government and social media could alleviate public concerns about vaccine safety and efficacy.

scholarly journals Hesitant or Not Hesitant? A Systematic Review on Global COVID-19 Vaccine Acceptance in Different Populations

Vaccines ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 873
Author(s):  
Maria Giulia Salomoni ◽  
Zeno Di Valerio ◽  
Elisa Gabrielli ◽  
Marco Montalti ◽  
Dario Tedesco ◽  
...  
Keyword(s):  
Systematic Review ◽  
Geographical Origin ◽  
Vaccine Hesitancy ◽  
Vaccine Acceptance ◽  
Public Health Systems ◽  
Pubmed Database ◽  
Collection Data ◽  
Different Populations ◽  
Acceptance Rates ◽  
Study Setting

Vaccination currently appears to be the only strategy to contain the spread of COVID-19. At the same time, vaccine hesitancy (VH) could limit its efficacy and has, therefore, attracted the attention of Public Health Systems. This systematic review aimed at assessing anti-COVID-19 vaccine acceptance rates worldwide and at identifying populations more prone to vaccine hesitancy, for which specific interventions should be planned. PubMed database was searched using a purposely formulated string. One hundred out of the 9243 studies retrieved were considered pertinent and thus included in the analyses. VH rate was analyzed according to patient geographical origin, ethnicity, age, study setting, and method used for data collection; data from specific populations were separately analyzed. Overall, this study demonstrated significant differences in terms of VH in the general population and in the specific subgroups examined according to geographical, demographic factors, as well as associated comorbidities, underlining the need for purposely designed studies in specific populations from the different countries, to design targeted programs aimed at increasing awareness for confidence and complacency toward COVID-19 vaccines.

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

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.

scholarly journals Thromboembolic and hemorrhagic risks after vaccination against SARS-CoV-2: a systematic review and meta-analysis of randomized controlled trials

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Noppacharn Uaprasert ◽  
Krissana Panrong ◽  
Ponlapat Rojnuckarin ◽  
Thita Chiasakul
Keyword(s):  
Systematic Review ◽  
Controlled Trial ◽  
Meta Analysis ◽  
Vaccine Hesitancy ◽  
Bleeding Events ◽  
Randomized Controlled ◽  
Increased Risk ◽  
Hemorrhagic Events ◽  
Estimated Risk ◽  
Low Incidence

Abstract Background Thromboembolic and bleeding events after vaccination against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are major public concerns leading to vaccine hesitancy. Due to low incidence, an individual randomized controlled trial (RCT) is underpowered to determine whether SARS-CoV-2 vaccines increase the risks of thromboembolism and hemorrhage. Methods We performed a literature search using PubMed, EMBASE, Cochrane, medRxiv databases, and reference lists of relevant articles to identify RCTs that reported thromboembolic, hemorrhagic events, and thromboembolism/hemorrhage-related death after SARS-CoV-2 vaccination. The primary aim of this systematic review and meta-analysis was to estimate the pooled thromboembolic risk related to SARS-CoV-2 vaccines compared to placebo. The secondary outcomes included estimating the risks of arterial thromboembolism (ATE), venous thromboembolisms (VTE), hemorrhage, thrombocytopenia, and thromboembolism/hemorrhage-related death. Results Eight RCTs of 4 vaccine platforms comprised of 195,196 participants were retrieved. SARS-CoV-2 vaccines were not associated with an increased risk of overall thromboembolism (risk ratio [RR], 1.14; 95% CI [confidence interval], 0.61–2.14; I2 = 35%), ATE (RR, 0.97; 95% CI, 0.46–2.06; I2 = 21%), VTE (RR, 1.47; 95% CI, 0.72–2.99; I2 = 0%), hemorrhage (RR, 0.97; 95% CI, 0.35–2.68; I2 = 0), and thromboembolism/hemorrhage-related death (RR, 0.53; 95% CI, 0.16–1.79; I2 = 0). Compared to the baseline estimated risk of these outcomes in participants administered placebos, the risk differences with vaccines were very small and not statistically significant. These findings were consistent in the subgroup analysis across 4 vaccine platforms. Conclusion Vaccines against SARS-CoV-2 are not associated with an increased risk of thromboembolism, hemorrhage, and thromboembolism/hemorrhage-related death.

HPV vaccine hesitancy among medical students in China: A multicenter survey

2021 ◽  
Author(s):  
liangru zhou ◽  
Jian Wang ◽  
Pengxin Cheng ◽  
Yue Li ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Medical Students ◽  
Hpv Vaccine ◽  
Online Survey ◽  
Information Sources ◽  
Health Management ◽  
Vaccine Coverage ◽  
World Health ◽  
Vaccine Hesitancy ◽  
Multicenter Survey ◽  
Vaccine Information

Abstract Background: In order to examine HPV information sources, vaccine hesitancy, and the association between the two variables. An online survey of HPV information sources and vaccine hesitancy was conducted among Chinese medical students. Methods: The World Health Organization (WHO) Vaccine Hesitancy 3C model was used to evaluate reasons for respondents' vaccine hesitancy. A probit model was used to investigate the association between vaccine information sources and vaccine hesitancy. Results: The reported rate of vaccine hesitancy was 62.36%. Convenience was the primary factor for vaccine hesitancy in medical students, and 37.23% used a single source to obtain vaccine information. A multivariate analysis revealed that men were 9% more likely to be hesitant about the HPV vaccine than women. Respondents without partners were 15% less hesitant than those with a partner. Respondents receiving HPV information through the Internet were 12% less likely to report vaccine hesitancy than those receiving information from other information channels. Conclusions: HPV vaccine hesitancy requires more attention. Future studies could examine whether increasing vaccination locations and dissemination of information about the safety and effectiveness of HPV vaccines as well as using Internet media would help reduce medical students’ vaccine hesitancy and expand HPV vaccine coverage. Trial registration: The study was conducted according to the guidelines of the Declaration of Helsinki,and approved by the Harbin Medical University School of Health Management & nstitutional Research Board (reference No.HMUIRB20210006, approved on 30 June 2021).

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