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Objective: To evaluate the prevalence of non-testing for HIV among immigrant men who have sex with men (MSM) residing in Brazil and identify associated factors., Design: An analytical web-survey study was conducted across all Brazilian states from January 2020 to May 2021., Sample: The study included 804 MSM immigrants from Portuguese-speaking countries., Measurements: Odds ratio (OR) and adjusted Odds Ratio (AOR) were utilized to determine the strength of the association between non-HIV testing and associated factors., Results: Among the participants, 63.7% had never undergone HIV testing. Multivariate analysis revealed several factors associated with a higher likelihood of not being tested for HIV: having a steady/monogamus partner (AOR: 1.5; 95%CI: 1.1-2.3) or both casual and steady partners (AOR: 1.8; 95%CI: 1.2-3.4), not engaging in bareback sex (AOR: 1.91; 95%CI: 3-3.5), being an immigrant in the country for less than 12 months (AOR: 3.7; 95%CI: 2.5-9.7), and having a preference for insertive (AOR: 1.5; 95%CI: 1.1-2.5) or receptive (AOR: 2.9; 95%CI: 1.4-5.7) roles. However, practicing chemsex was found to be a protective factor for testing (AOR: 4)., Conclusion: To enhance HIV prevention strategies, it is crucial to implement specific measures that ensure accessibility, confidentiality, and a reduction in stigma associated with HIV testing., (© 2023 Wiley Periodicals LLC.)

Objectives: to assess agreement with COVID-19 disinformation among Portuguese-speaking individuals aged 50 years or older., Methods: a descriptive and analytical study involving 1,214 older adults born in Portuguese-speaking countries. Data collection occurred through online information mining to recognize COVID-19 and disinformation content, and the application of a structured questionnaire., Results: agreement with disinformation content was 65.2%. Residing outside Brazil is a protective factor for agreement with disinformation content, and those who believe in the truthfulness of the information sources they receive were 31% more likely to agree with disinformation content., Conclusions: there is a high prevalence of disinformation among the older population in two Portuguese-speaking countries, which should raise the attention of healthcare professionals and guide coping strategies.

This bibliometric analysis aims to analyze the global scientific production of COVID-19 and vaccines. First, a search for scientific articles was performed using the advanced query in the Web of Science™ database, more precisely in its core collection, on 18 February 2023. Data from 7754 articles were analyzed using the Bibliometrix R package and the Biblioshiny application. The evaluated articles were published mainly in 2022 (60%). The scientific journals that published the most about COVID-19 and vaccines were "Vaccines", "Vaccine" and "Human Vaccines & Immunotherapeutics". The University of Oxford was the most productive institution, with the authors of the articles mainly originating from the United States, China and the United Kingdom. The United States, despite having carried out the most significant number of collaborations, published mainly with local researchers. The 15 most cited articles and the KeyWords Plus™ evidenced the focus of the published articles on the safety and efficacy of vaccines against COVID-19, as well as on the evaluation of vaccine acceptance, more specifically on vaccine hesitancy. Research funding came primarily from US government agencies.