The measures taken by US President Joe Biden to backstop hospitals and distribute coronavirus test kits, are too little, too late to curb a surge of Omicron-related coronavirus cases over Christmas and New Year's, health experts warned.

Former US President Donald Trump says he is “appreciative” President Joe Biden after the latter praised him over the development of the Covid-19 vaccines.

The WHO says the Omicron coronavirus variant poses ‘very high’ global risk but data on its severity remain limited.

Two-dose COVID-19 vaccine regimens do not induce enough neutralizing antibodies against the Omicron coronavirus variant, British scientists say.

Experts say inoculation campaigns in some African nations face serious challenges amid shortages of funds, medical staff and equipment.

Future pandemics could be even more lethal than COVID-19, one of the creators of the Oxford-AstraZeneca vaccine said.

scientists say they are bracing for hundreds of Omicron cases in the coming weeks.