A new Covid variant called Stratus or XFG is spreading across 38 countries. The World Health Organisation is monitoring this Omicron subvariant. Stratus has unique mutations but causes mild symptoms ...

Kelechi Wisdom Elechi is a doctoral researcher specialising in ageing neurodegenerative diseases. With a background in ...

A Qatar-based study involving 121,700 patients has underscored the importance of the post-vaccination monitoring to optimise ...

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.