Vaccination

Study: Chinese COVID shot may offer elderly poor protection

A new study suggests that a Sinopharm vaccine offers poor protection from COVID-19 among the elderly, raising questions for dozens of countries that have given the Chinese company's shots to their most vulnerable populations.

Diseases, Conditions, Syndromes

Prior COVID-19 infection reduces infection risk for up to 10 months

The risk of being infected with SARS-CoV-2, the virus that causes COVID-19, is substantially reduced for up to 10 months following a first infection, according to new findings from the Vivaldi study led by UCL researchers.

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