We report a retrospective, population-based cohort study performed in Shanghai, China, using electronic databases with information on SARS-CoV-2 infections and vaccination history. We compared ...

Researchers deliberately infect participants with SARS-CoV-2 in ‘challenge’ trials — but high levels of immunity complicate ...

Studies Find Omicron Related Hospitalizations Lower ... COVID-19 Vaccine Gives Substantial Protection Against Reinfection, Study Finds Nov. 22, 2022 — Individuals previously infected with ...

This is an observer-blinded, three-arms study in 376 patients in Chinese ... has continued to pose threat to human health, as reinfection by new variants could still result in long COVID-19 ...

There's no way to know without further study whether previous infection would increase or decrease the risk of reinfection in other Omicron subvariants, such as the currently circulating XBB and EG.

Within the FLiRT family, one variant in particular has risen to prominence: KP.2, which accounted for about 25% of new ...

Vaccination is one of mankind’s most miraculous innovations. The eradication of smallpox, and the retreat of measles and ...

These variants are distant Omicron ... against reinfection, Topol says, and the virus hasn’t mutated enough to become wildly different from previous strains. A recent study from researchers ...

These variants are distant Omicron ... against reinfection, Topol says, and the virus hasn’t mutated enough to become wildly different from previous strains. A recent study from researchers ...