The World Health Organization has said it is monitoring a new coronavirus variant known as "Mu", which was first identified in Colombia in January.
Mu, known scientifically as B.1.621,…
Hundreds of thousands of people in China were in lockdown on Friday as the country battled its worst Covid-19 outbreak in months, while Japan -- a week into the Olympics -- extended its…
A highly contagious variant of COVID-19 first identified in Britain does not cause more severe disease in hospitalised patients, according to a new study published in the medical journal The…