Immunity acquired from a COVID-19 infection can provide strong and lasting protection against severe illness and death, according to the largest meta-analysis to date on immunity following infection published in The Lancet.
Health officials from Europe and the US are calling for international action to tackle the spread of avian influenza as fears grow that the virus could mutate and spread among humans.
New York City health officials are warning residents that the infectious omicron subvariant XBB.1.5 may be more likely to infect people who have already been vaccinated or infected with COVID-19.
