Background: Supporters of the antivaccination movement can easily spread information that is not scientifically proven on social media. Therefore, learning more about their posts and activities is instrumental in effectively reacting and responding to the false information they publish, which is aimed at discouraging people from taking vaccines. Objective: This study aims to gather, assess, and synthesize evidence related to the current state of knowledge about antivaccine social media users’ web-based activities. Methods: We systematically reviewed English-language papers from 3 databases (Scopus, Web of Science, and PubMed). A data extraction form was established, which included authors, year of publication, specific objectives, study design, comparison, and outcomes of significance. We performed an aggregative narrative synthesis of the included studies. Results: The search strategy retrieved 731 records in total. After screening for duplicates and eligibility, 18 articles were included in the qualitative synthesis. Although most of the authors analyzed text messages, some of them studied images or videos. In addition, although most of the studies examined vaccines in general, 5 focused specifically on human papillomavirus vaccines, 2 on measles vaccines, and 1 on influenza vaccines. The synthesized studies dealt with the popularity of provaccination and antivaccination content, the style and manner in which messages about vaccines were formulated for the users, a range of topics concerning vaccines (harmful action, limited freedom of choice, and conspiracy theories), and the role and activity of bots in the dissemination of these messages in social media. Conclusions: Proponents of the antivaccine movement use a limited number of arguments in their messages; therefore, it is possible to prepare publications clarifying doubts and debunking the most common lies. Public health authorities should continuously monitor social media to quickly find new antivaccine arguments and then create information campaigns for both health professionals and other users.

Social media allow anti-vaxxers to quickly spread misinformation and false statements. This situation may lead to an increase in vaccine hesitancy. We wanted to characterize what arguments against COVID-19 vaccines run on Facebook in Poland. We analyzed Facebook comments related to the five events of the introduction of COVID-19 vaccines—announcements of the efficacy of the Pfizer-BioNTech (09.11.2020), Moderna (16.11.2020), and AstraZeneca (23.11.2020) vaccines, registration of the Pfizer-BioNTech vaccine by the European Medicines Agency (21.12.2020), and the first vaccination in Poland (27.12.2020). We collected the comments from fanpages of the biggest Polish media and then established their main anti-vaccine themes. We found that the negative arguments about COVID-19 vaccines can be divided into 12 categories. Seven of them are universal and also apply to other vaccines but five are new and COVID-19’ specific. The frequency of arguments from a given category varied over time. We also noticed that, while the comments were mostly negative, the reactions were positive. Created codebook of anti-vaccine COVID-19 arguments can be used to monitor the attitude of society towards COVID-19 vaccines. Real-time monitoring of social media is important because the popularity of certain arguments on Facebook changes rapidly over time.

During the COVID-19 pandemic, social media content analysis allowed for tracking attitudes toward newly introduced vaccines. However, current evidence is limited to single social media platforms. Our objective was to compare arguments used by anti-vaxxers in the context of COVID-19 vaccines across Facebook, Twitter, Instagram, and TikTok. We obtained the data set of 53,671 comments regarding COVID-19 vaccination published between August 2021 and February 2022. After that, we established categories of anti-vaccine content, manually classified comments, and compared the frequency of occurrence of the categories between social media platforms. We found that anti-vaxxers on social media use 14 categories of arguments against COVID-19 vaccines. The frequency of these categories varies across different social media platforms. The anti-vaxxers’ activity on Facebook and Twitter is similar, focusing mainly on distrust of government and allegations regarding vaccination safety and effectiveness. Anti-vaxxers on TikTok mainly focus on personal freedom, while Instagram users encouraging vaccination often face criticism suggesting that vaccination is a private matter that should not be shared. Due to the differences in vaccine sentiment among users of different social media platforms, future research and educational campaigns should consider these distinctions, focusing more on the platforms popular among adolescents (i.e., Instagram and TikTok).

COVID-19 vaccination raises numerous concerns among the public, and also among medical personnel including nurses. As nurses play a crucial role in the process of vaccination, it is important to recognize the attitudes of students of nursing, nurses in spe, toward COVID-19 vaccination, as well as to define the factors influencing students’ pro-vaccine choices. The study was conducted between March and April 2021 at all medical universities in Poland educating nurses in spe. The study included 793 first-degree students from 12 universities. The results revealed that the vast majority of students of nursing (77.2%) were vaccinated against COVID-19, as 61.2% received an mRNA vaccine and 16% a viral vector vaccine. Every other person in the non-vaccinated group declared their intention to get a vaccination. A trend was observed whereby people co-living with persons from the risk group, who are at risk of a severe form of COVID-19, showed greater willingness to get a vaccine. The study results identified the role of universities in increasing the vaccination rate among students, both in terms of education about vaccinations and in shaping pro-vaccine attitudes among students, as well as organizing vaccinations on university campuses to facilitate the process.

Geographic access to radiation therapy facilities remains a critical challenge in global cancer care, particularly in low- and middle-income countries (LMICs). Although radiotherapy is essential for most cancer patients, global patterns of accessibility and strategies to improve them remain poorly understood. Our aim was to conduct a comprehensive global assessment of geographic accessibility to radiotherapy and to identify optimal locations for new facilities. We conducted a geospatial analysis combining locations of international radiotherapy centers from the International Atomic Energy Agency Directory of Radiotherapy Centers with global administrative boundaries for 178,218 subregions, population density data, and road network information. We calculated population coverage within specific travel time thresholds and developed an optimization model to identify optimal locations for new facilities to maximize population coverage within 120 min of travel time. Currently, 76.3% of the global population has access to radiotherapy within 120 min, with substantial disparities across World Bank income groups: 17.1% in low-income countries, compared to 73.4% in lower-middle-income, 85.0% in upper-middle-income, and 93.1% in high-income countries. Strategic placement of just 100 new centers worldwide would increase global coverage to 82.1%, while 500 new centers by 2050 would mitigate the projected widening of access disparities driven by the rise in cancer incidence in LMICs. Our findings reveal significant geographic disparities in radiotherapy access and demonstrate that the targeted placement of a relatively modest number of new centers could substantially improve global accessibility, particularly in underserved regions where the cancer burden is projected to increase most rapidly.

The COVID-19 pandemic had a huge impact on the mental health of people around the world, and it increased the level of fear of infection and anxiety about the consequences of the disease caused by the SARS-CoV-2 virus. We examined the relationship between the level of anxiety among nursing students and their knowledge about COVID-19 vaccination. In addition, we explored the correlations among the level of anxiety, knowledge about vaccination, and the willingness to vaccinate against COVID-19. A total of 790 undergraduate nursing students participated in the study. The results demonstrated that the level of anxiety among the surveyed nursing students was low; 40% of the study participants did not report any anxiety at all, 30% reported mild anxiety, 20% reported moderate anxiety, and 9% reported severe anxiety. At the time of the study, 77.2% of the participants were already vaccinated against COVID-19. Student knowledge about vaccination against COVID-19 was high and anxiety levels were low, with no direct correlation between the knowledge of vaccination and the severity of anxiety.