scholarly journals The shot, the message, and the messenger: COVID-19 vaccine acceptance in Latin America

npj Vaccines ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Pablo Argote ◽  
Elena Barham ◽  
Sarah Zukerman Daly ◽  
Julian E. Gerez ◽  
John Marshall ◽  
...  
Keyword(s):  
Latin America ◽  
Herd Immunity ◽  
Mass Vaccination ◽  
Vaccine Hesitancy ◽  
Vaccine Acceptance ◽  
State Institutions ◽  
Country Analysis ◽  
Foreign Governments ◽  
Vaccination Campaigns ◽  
Mass Inoculation

AbstractHerd immunity by mass vaccination offers the potential to substantially limit the continuing spread of COVID-19, but high levels of vaccine hesitancy threaten this goal. In a cross-country analysis of vaccine hesitant respondents across Latin America in January 2021, we experimentally tested how five features of mass vaccination campaigns—the vaccine’s producer, efficacy, endorser, distributor, and current population uptake rate—shifted willingness to take a COVID-19 vaccine. We find that citizens preferred Western-produced vaccines, but were highly influenced by factual information about vaccine efficacy. Vaccine hesitant individuals were more responsive to vaccine messengers with medical expertise than political, religious, or media elite endorsements. Citizen trust in foreign governments, domestic leaders, and state institutions moderated the effects of the campaign features on vaccine acceptance. These findings can help inform the design of unfolding mass inoculation campaigns.

scholarly journals Are We Ready for the Arrival of the New COVID-19 Vaccinations? Great Promises and Unknown Challenges Still to Come

Vaccines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 173
Author(s):  
Davide Gori ◽  
Chiara Reno ◽  
Daniel Remondini ◽  
Francesco Durazzi ◽  
Maria Pia Fantini
Keyword(s):  
Herd Immunity ◽  
The Elderly ◽  
Vaccine Hesitancy ◽  
Current Crisis ◽  
Complex Issue ◽  
The Public ◽  
The Social ◽  
To Come ◽  
Vaccination Campaigns ◽  
The Eu

While the SARS-CoV-2 pandemic continues to strike and collect its death toll throughout the globe, as of 31 January 2021, the vaccine candidates worldwide were 292, of which 70 were in clinical testing. Several vaccines have been approved worldwide, and in particular, three have been so far authorized for use in the EU. Vaccination can be, in fact, an efficient way to mitigate the devastating effect of the pandemic and offer protection to some vulnerable strata of the population (i.e., the elderly) and reduce the social and economic burden of the current crisis. Regardless, a question is still open: after vaccination availability for the public, will vaccination campaigns be effective in reaching all the strata and a sufficient number of people in order to guarantee herd immunity? In other words: after we have it, will we be able to use it? Following the trends in vaccine hesitancy in recent years, there is a growing distrust of COVID-19 vaccinations. In addition, the online context and competition between pro- and anti-vaxxers show a trend in which anti-vaccination movements tend to capture the attention of those who are hesitant. Describing this context and analyzing its possible causes, what interventions or strategies could be effective to reduce COVID-19 vaccine hesitancy? Will social media trend analysis be helpful in trying to solve this complex issue? Are there perspectives for an efficient implementation of COVID-19 vaccination coverage as well as for all the other vaccinations?

COVID-19 Vaccine Hesitancy on Social Media: Building a Public Twitter Dataset of Anti-vaccine Content, Vaccine Misinformation and Conspiracies (Preprint)

2021 ◽  
Author(s):  
Goran Muric ◽  
Yusong Wu ◽  
Emilio Ferrara
Keyword(s):  
Social Media ◽  
Data Collection ◽  
Herd Immunity ◽  
Application Programming Interface ◽  
Data Access ◽  
Vaccine Hesitancy ◽  
Global Public Health ◽  
News Sources ◽  
Online Social Media ◽  
Vaccination Campaigns

BACKGROUND False claims about COVID-19 vaccines can undermine public trust in ongoing vaccination campaigns, thus posing a threat to global public health. Misinformation originating from various sources has been spreading online since the beginning of the COVID-19 pandemic. Anti-vaccine activists have also begun to utilize platforms like Twitter to share their views. To properly understand the phenomenon of vaccine hesitancy through the lens of online social media, it is of greatest importance to gather the relevant data. OBJECTIVE In this paper, we describe a dataset of Twitter posts that exhibit a strong anti-vaccine stance. The dataset is made available to the research community via our AvaxTweets dataset GitHub repository. METHODS We started the ongoing data collection on October 18, 2020, leveraging the Twitter streaming application programming interface (API) to follow a set of specific anti-vaccine related keywords. Additionally, we collect the historical tweets of the set of accounts that engaged in spreading anti-vaccination narratives at some point during 2020. RESULTS Since the inception of our collection, we have published two collections: a) a streaming keyword-centered data collection with more than 1.8 million tweets, and b) a historical account-level collection with more than 135 million tweets. In this paper we present descriptive analyses showing the volume of activity over time, geographical distributions, topics, news sources, and inferred accounts’ political leaning. CONCLUSIONS The vaccine-related misinformation on social media may exacerbate the levels of vaccine hesitancy, hampering the progress toward vaccine-induced herd immunity, and potentially increase infections related to new COVID-19 variants. For these reasons, understanding vaccine hesitancy through the lens of social media is of paramount importance. Since data access is the first obstacle to attain that, we publish the dataset that can be used in studying anti-vaccine misinformation on social media and enable a better understanding of vaccine hesitancy.

scholarly journals Lack of lockdown, open borders, and no vaccination in sight: is Bosnia and Herzegovina a control group?

2021 ◽  
Author(s):  
Adnan Fojnica ◽  
Ahmed Osmanovic ◽  
Nermin Đuzic ◽  
Armin Fejzic ◽  
Ensar Mekic ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Bosnia And Herzegovina ◽  
Health Care Professionals ◽  
Herd Immunity ◽  
Cross Sectional Study ◽  
Vaccine Hesitancy ◽  
Control Group ◽  
Cross Sectional ◽  
Vaccine Acceptance ◽  
Open Borders

AbstractBosnia and Herzegovina is among ten countries in the world with the highest mortality rate due to COVID-19 infection. Lack of lockdown, open borders, high mortality rate, no herd immunity, no vaccination plan, and strong domestic anti-vaccination movement present serious COVID-19 concerns in Bosnia and Herzegovina. In such circumstances, we set out to study if the population is willing to receive the vaccine.A cross-sectional study was conducted among 10,471 adults in Bosnia and Herzegovina to assess the attitude of participants toward COVID-19 vaccination. Using a logistic regression model, we assessed the associations of sociodemographic characteristics with vaccine rejection, reasons for vaccine hesitancy, preferred vaccine manufacturer, and information sources.Surprisingly, only 25.7% of respondents indicated they would like to get a COVID-19 vaccine, while 74.3% of respondents were either hesitant or completely rejected vaccination. The vaccine acceptance increased with increasing age, education, and income level. Major motivation of pro-vaccination behaviour was intention to achieve collective immunity (30.1%), while the leading incentive for vaccine refusal was deficiency of clinical data (30.2%). The Pfizer-BioNTech vaccine is shown to be eightfold more preferred vaccine compared to the other manufacturers. For the first time, vaccine acceptance among health care professionals has been reported, where only 39.4% of healthcare professionals expressed willingness to get vaccinated.With the high share of the population unwilling to vaccinate, governmental impotence in securing the vaccines supplies, combined with the lack of any lockdown measures suggests that Bosnia and Herzegovina is unlikely to put COVID-19 pandemic under control in near future.

scholarly journals The Barrier to Vaccination Is Not Vaccine Hesitancy: Patterns of COVID-19 Vaccine Acceptance over the Course of the Pandemic in 23 Countries

2021 ◽  
Author(s):  
Ammina Kothari ◽  
Gerit Pfuhl ◽  
David Schieferdecker ◽  
Casey Taggart Harris ◽  
Caitlin Tidwell ◽  
...  
Keyword(s):  
Herd Immunity ◽  
Longitudinal Survey ◽  
Vaccine Hesitancy ◽  
Vaccine Acceptance ◽  
Large Numbers ◽  
The World ◽  
Main Barrier ◽  
Actual Vaccine ◽  
Over Time ◽  
Intent To Vaccinate

AbstractBackgroundAt present, evidence is inconclusive regarding what factors influence vaccine intent, and whether there are widespread disparities across populations and time. The current study provides new insights regarding vaccine intent and potential differences across 23 countries and over time.MethodsOur data come from a unique longitudinal survey that contains responses from Facebook users (N=1,425,172) from the 23 countries from four continents collected in 18 waves from July 2020 through March 2021.ResultsWe find that vaccine intent varies significantly across countries and over time. Across countries, there are notable disparities in intent to vaccinate. Regarding time, intent has recently reached an all-time high. Our data demonstrates that intent to vaccinate has increased as countries have deployed vaccines on larger scales with undecidedness declining. However, there are some countries where vaccine intent is stagnant and in one country – Egypt – where it seems to have declined.InterpretationsLarge numbers of citizens across the world are willing to get vaccinated. In the vast majority of countries in our sample, these were high enough to reach more conservative levels of herd immunity1 if combined with numbers of persons already infected. As such, the main barrier to vaccination is not vaccine hesitancy, but the shortage of vaccines. This sends a clear message to politicians who need to work on a quick and fair distribution of vaccine; and to scientists who need to focus their attention on understanding remaining pockets of vaccine skepticism or undecidedness and on factors that explain actual vaccine behavior, rather than intent.

scholarly journals COVID19 Vaccine Intentions in South Africa: Health Communication Strategy to Address Vaccine Hesitancy

2021 ◽  
Author(s):  
Umakrishnan Kollamparambil ◽  
Adeola Oyenubi ◽  
Chijioke Nwosu
Keyword(s):  
South Africa ◽  
Health Communication ◽  
Perceived Risk ◽  
Herd Immunity ◽  
National Income ◽  
Population Group ◽  
Communication Strategy ◽  
African Population ◽  
Vaccine Hesitancy ◽  
Vaccine Acceptance

Abstract Background: Widespread vaccine acceptance is key to achieving herd immunity through vaccination against COVID19, especially because the available vaccines do not have 100% efficacy. The continued infection amongst the unvaccinated can lead to heightened risk of further virus mutation, exposing even those vaccinated to new virus strains. Therefore, there are social benefits in minimising vaccine hesitancy. The objective of this study is to assess the level of COVID19 vaccine hesitancy in South Africa, identify the socio-economic patterns in vaccine hesitancy and to develop a targeted health communication strategy based on the HBM and EPPM models in order to improve vaccine acceptance. Methods: The study uses the nationally representative National Income Dynamics Study - Coronavirus Rapid Mobile Survey (NIDS-CRAM) survey. The analysis combines univariate and bivariate statistics together with multivariate regression models like binomial/ordinal logit and seemingly unrelated regressions.Results: The study finds that vaccine acceptance is lower than that of non-pharmaceutical intervention life face-mask use. Only 55% are fully accepting of the vaccine, while a further 16% are moderately accepting of vaccines. Together, vaccine acceptance is estimated at 70.8% and vaccine hesitancy against COVID19 is estimated at 29.2% amongst the adult South African population. The reasons cited for vaccine hesitancy are primarily due to concerns regarding the side-effects and efficacy of vaccine. the study has identified perceived risk of infection with the mediating role of efficacy as a key predictor of vaccine intention. Apart from vulnerability to infection, those perceiving higher severity of risk (elderly and those with chronic illness) have lower hesitancy. Higher awareness of COVID19 related information and higher household income are correlated with lower vaccine hesitancy. The non-black African population group has significantly high vaccine hesitancy compared to black Africans. Males on average have lower hesitancy compared to females, and unmarried/unpartnered individuals are found to have higher hesitancy. Conclusions: There are other significant differences across socio-economic and demographic variables in vaccine hesitancy. From a communication perspective, it is imperative to continue risk messaging, hand in hand with clearer information on the efficacy of the vaccines

scholarly journals Mathematical modeling of endemic cholera transmission

2021 ◽  
Author(s):  
Dennis L Chao
Keyword(s):  
Mathematical Modeling ◽  
Herd Immunity ◽  
Population Level ◽  
Additional Benefit ◽  
Mass Vaccination ◽  
The Cost ◽  
Vaccination Campaigns ◽  
The Impact ◽  
Indirect Protection ◽  
Endemic Cholera

Abstract Mathematical modeling can be used to project the impact of mass vaccination on cholera transmission. Here, we discuss two examples for which indirect protection from mass vaccination needs to be considered. In the first, we show that non-vaccinees can be protected by mass vaccination campaigns. This additional benefit of indirect protection improves the cost-effectiveness of mass vaccination. In the second, we model the use of mass vaccination to eliminate cholera. In this case, a high population level of immunity, including contributions from infection and vaccination, is required to reach the “herd immunity” threshold needed to stop transmission and achieve elimination.

Evidence-based strategies to promote vaccine acceptance

2021 ◽  
Vol 26 (7) ◽  
pp. 338-343
Author(s):  
Alison While
Keyword(s):  
Vaccination Programme ◽  
Herd Immunity ◽  
Vaccine Hesitancy ◽  
Evidence Based ◽  
Vaccine Acceptance ◽  
Vaccination Uptake

The success of a vaccination programme depends upon its coverage so that it provides herd immunity. Vaccine hesitancy has the potential to undermine a vaccine programme. Evidence suggests that some strategies are more effective in promoting vaccination uptake. Community nurses should help in the promotion of vaccination uptake using evidence-based interventions and through ‘Making Every Contact Count’.

Parents’ malevolent personification of mass vaccination solidifies vaccine hesitancy

2020 ◽  
pp. 135910532090347
Author(s):  
Gal Noyman-Veksler ◽  
David Greenberg ◽  
Itamar Grotto ◽  
Golan Shahar
Keyword(s):  
Vaccination Campaign ◽  
Mass Vaccination ◽  
Vaccine Hesitancy ◽  
Parental Anxiety ◽  
Wild Poliovirus ◽  
Before And After ◽  
Vaccination Campaigns

Parental hesitancy to vaccinate their children derails the success of mass vaccination campaigns. We examined the effect of parents’ personification of the vaccinating agency on vaccine hesitancy (i.e. negative or positive mind change) in 555 parents in a mass wild poliovirus vaccination campaign. Parents were assessed before and after the campaign on attitudes toward vaccination and the vaccinating agency (“The Israeli MoH is caring” vs “hysteric”). Positive mind change was predicted by a gender and malevolent personification. A negative mind change was predicted by parental anxiety. We conclude that parental hesitancy is influenced by parents’ attachment to the vaccinating agency.

scholarly journals Social Distancing, Lockdown and the Wide Use of Mask; A Magic Solution or a Double-Edged Sword for Respiratory Viruses Epidemiology?

Vaccines ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 595
Author(s):  
Ivan Sanz-Muñoz ◽  
Sonia Tamames-Gómez ◽  
Javier Castrodeza-Sanz ◽  
José María Eiros-Bouza ◽  
Raul Ortiz de Lejarazu-Leonardo
Keyword(s):  
Respiratory Syncytial Virus ◽  
Herd Immunity ◽  
Respiratory Viruses ◽  
Mass Vaccination ◽  
Influenza Vaccines ◽  
Social Distancing ◽  
Collateral Effects ◽  
Syncytial Virus ◽  
Vaccination Campaigns ◽  
Pharmaceutical Interventions

The use of non-pharmaceutical interventions (NPIs), such as social distancing, lockdowns and the massive use of masks, have not only largely prevented the spread of SARS-CoV-2, but also of other respiratory viruses such as influenza or respiratory syncytial virus (RSV). This decrease has been so high that, in most countries, the influenza and RSV epidemic has not occurred. Far from being a beneficial fact, this can be problematic, since the absence of circulation of certain pathogens can lead to a decrease in herd immunity against them. This can promote the rise of more serious, longer-lasting epidemics that start sooner. To alleviate the collateral effects that may occur due to the decrease in circulation of viruses such as influenza, it is necessary to increase the production of influenza vaccines, carry out mass vaccination campaigns and focus on vaccinating the main drivers of this virus, children.

scholarly journals COVID-19 vaccination intention and vaccine characteristics influencing vaccination acceptance: a global survey of 17 countries

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Li Ping Wong ◽  
Haridah Alias ◽  
Mahmoud Danaee ◽  
Jamil Ahmed ◽  
Abhishek Lachyan ◽  
...  
Keyword(s):  
Adverse Reactions ◽  
Local Population ◽  
Herd Immunity ◽  
Vaccine Hesitancy ◽  
Multivariable Logistic Regression Analysis ◽  
Individual Country ◽  
Vaccine Acceptance ◽  
Vaccination Acceptance ◽  
Mrna Technology ◽  
To Receive

Abstract Background The availability of various types of COVID-19 vaccines and diverse characteristics of the vaccines present a dilemma in vaccination choices, which may result in individuals refusing a particular COVID-19 vaccine offered, hence presenting a threat to immunisation coverage and reaching herd immunity. The study aimed to assess global COVID-19 vaccination intention, vaccine characteristics influencing vaccination acceptance and desirable vaccine characteristics influencing the choice of vaccines. Methods An anonymous cross-sectional survey was conducted between 4 January and 5 March 2021 in 17 countries worldwide. Proportions and the corresponding 95% confidence intervals (CI) of COVID-19 vaccine acceptance and vaccine characteristics influencing vaccination acceptance were generated and compared across countries and regions. Multivariable logistic regression analysis was used to determine the factors associated with COVID-19 vaccine hesitancy. Results Of the 19,714 responses received, 90.4% (95% CI 81.8–95.3) reported likely or extremely likely to receive COVID-19 vaccine. A high proportion of likely or extremely likely to receive the COVID-19 vaccine was reported in Australia (96.4%), China (95.3%) and Norway (95.3%), while a high proportion reported being unlikely or extremely unlikely to receive the vaccine in Japan (34.6%), the U.S. (29.4%) and Iran (27.9%). Males, those with a lower educational level and those of older age expressed a higher level of COVID-19 vaccine hesitancy. Less than two-thirds (59.7%; 95% CI 58.4–61.0) reported only being willing to accept a vaccine with an effectiveness of more than 90%, and 74.5% (95% CI 73.4–75.5) said they would accept a COVID-19 vaccine with minor adverse reactions. A total of 21.0% (95% CI 20.0–22.0) reported not accepting an mRNA vaccine and 51.8% (95% CI 50.3–53.1) reported that they would only accept a COVID-19 vaccine from a specific country‐of‐origin. Countries from the Southeast Asia region reported the highest proportion of not accepting mRNA technology. The highest proportion from Europe and the Americas would only accept a vaccine produced by certain countries. The foremost important vaccine characteristic influencing vaccine choice is adverse reactions (40.6%; 95% CI 39.3–41.9) of a vaccine and effectiveness threshold (35.1%; 95% CI 33.9–36.4). Conclusions The inter-regional and individual country disparities in COVID-19 vaccine hesitancy highlight the importance of designing an efficient plan for the delivery of interventions dynamically tailored to the local population. Graphic Abstract

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