

When compared to other masks, only N-95s were found to meet or to be close to occupational health standards, according to a small study published in PLOS One. The study found that N95s had 97-99% filtration efficiency (without fit testing), compared to KN94 and KN95 masks, which were found to have around 70% filtration efficiency.

*Editor’s note: The Polybio Research Foundation, like The Sick Times, has received support from the Balvi and Kanro funds. Our newsroom operates independently of financial supporters.


People who recently had COVID-19 are at higher risk for other viral and bacterial infections, according to a paper published in The Lancet Infectious Diseases. The researchers used Veterans Affairs electronic health records from over 800,000 people, and compared infection history between those who had a positive COVID-19 test and those who did not. Those…



Last week, researchers met for the Conference for Retroviruses and Opportunistic Infections (CROI) in San Francisco, California. While the conference focuses on HIV and related diseases, it has included research on Long COVID and COVID-19 in recent years due to their impacts on people with HIV. This year, there were at least 24 papers that…


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