COVID-19 infection boosts mask-wearing, study finds
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Updates every hour. Last Updated: 21-Jun-2026 13:16 ET (21-Jun-2026 17:16 GMT/UTC)
A study by The University of Osaka reveals that people who have had COVID-19 are more likely to wear masks. This is driven not by fear, but by an increased awareness of being a potential "silent carrier." The finding suggests that public health messages based on patients' real experiences, highlighting the risk of asymptomatic spread, could be more effective in encouraging preventive behaviors in the general population for future pandemics.
A comprehensive new review published in the Journal of Management synthesizes decades of research to understand the epidemic of workplace loneliness. By analyzing 233 empirical studies, researchers from Portland State University have identified how workplace conditions contribute to isolation and offer evidence-based paths to reconnection.
The research emphasizes that loneliness is distinct from social isolation. While isolation is about being alone, loneliness is the subjective feeling that one’s social relationships are deficient—meaning employees can feel deeply lonely even in a crowded office.
"Given the connection between workplace characteristics and loneliness, organizations should consider that loneliness is not a personal issue, and instead is a business issue," said Berrin Erdogan, professor of management at Portland State. "Businesses have an opportunity to design jobs and organizations in a way that will prioritize employee relational well being."
Scientists have uncovered a previously unknown cluster of brain cells that may help explain differences in social behavior between males and females. The small neural circuit appears to function like an on–off switch, showing a striking pattern of activity that differs sharply by sex, an unusually clear contrast compared with most known brain sex differences, which tend to be more subtle and overlapping. Researchers also found that the circuit’s activity shifts with social and reproductive status, suggesting the brain may use this mechanism to adapt behavior across key life stages.
Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, publishing January 22nd in the open-access journal PLOS Biology.
Generative AI is reshaping software development – and fast. A new study published in Science shows that AI-assisted coding is spreading rapidly, though unevenly: in the U.S., the share of new code relying on AI rose from 5% in 2022 to 29% in early 2025, compared with just 12% in China. AI usage is highest among less experienced programmers, but productivity gains go to seasoned developers.
A newly sequenced genome of the bacterium that causes syphilis, Treponema pallidum, highlights the deep antiquity of treponemal diseases in the Americas. The findings, based on a 5,500-year-old specimen from Colombia, suggest syphilis’s emergence was not dependent on the agricultural intensification and population crowding often linked to the spread of infectious disease. Instead, it was dependent on social and ecological conditions of hunter-gatherer societies. “Reframing syphilis, alongside other infectious diseases, as products of both localized and highly specific evolutionary, ecological, and biosocial conditions and globalization may represent critical steps toward reducing stigma and improving public health,” write Molly Zuckerman and Lydia Ball in a related perspective. Treponemal diseases, such as syphilis, yaws, bejel, and pinta, have afflicted human populations across much of the world for thousands of years. However, much about the global antiquity and distribution of these diseases, as well as the evolutionary history of the bacteria that cause them, remains unknown. Among the most debated questions is the geographic origin and global spread of syphilis, which is caused by the bacterium T. pallidum. Some argue that the disease originated in the Americas and was brought to the Eastern Hemisphere following European contact in the late 15th century. Others maintain that Treponema was already present in Europe before contact. Yet the rarity and ambiguity of skeletal evidence of these diseases and the technical difficulty of recovering ancient bacterial DNA from affected remains has made addressing these questions difficult.
David Bozzi and colleagues present a 5,500-year-old Treponema genome recovered from Middle Holocene-age human hunter-gatherer remains from Colombia. The new evidence extends the known genetic record of this pathogen by roughly 3,000 years. According to Bozzi et al., phylogenetic analysis shows that this genome (TE1-3) represents a previously unknown branch of T. pallidum that split off before all other known subspecies emerged. Although it falls clearly within the T. pallidum species, TE1-3 is genetically diverse and distinct from modern strains. Notably, the authors found that TE1-3 also carries the full suite of genetic features associated with virulence in modern T. pallidum. Moreover, the findings suggest that T. pallidum predates the rise of agriculture in the Americas, indicating that the pathogen’s emergence was not dependent on the agricultural intensification and population crowding often linked to the spread of infectious disease. Instead, the TE1-3 lineage is associated with the social and ecological conditions of hunter-gatherer societies, including high mobility, small community interactions, and close contact with wild animals. According to Bozzi et al., the study’s findings expand the temporal, ecological, and social framework for understanding treponemal disease worldwide.