Biden announces half a billion free home Covid tests to fight Omicron

The move is part of a renewed White House effort that includes the Pentagon calling up 1,000 troops to deploy to hard-hit hospitals and the Federal Emergency Management Agency (Fema) working to expand medical capacity.

But as Covid-19 once again rages across America via the new Omicron variant, the president, speaking from the White House, did not discourage Christmas gatherings, impose vaccine mandates for domestic air travel or seek a new round of lockdowns.

Federal health officials said on Monday that Omicron has raced ahead of other variants and is now the dominant version in the US, accounting for three in four new infections last week. Biden, who earlier this month unveiled a winter plan to combat the pandemic dogging his political fortunes, has been forced to revise his strategy.

He announced that his administration is buying 500m at-home, rapid tests this winter to be distributed for free to Americans who want them, with initial delivery starting next month. A website will enable people to order them to be delivered to their home for free.

Biden also unveiled additional vaccination resources. Currently 73% of adult Americans are fully vaccinated.

He also urged parents to get their children vaccinated and said the government now has the knowledge and tools to keep schools open, even when Covid-19 cases are reported.

In addition, Biden is instructing Fema to mobilise planning teams to work with every state and territory to assess hospital needs ahead of winter surges, and to start expanding hospital bed capacity.

In his address from the state dining room, Biden condemned rightwing media personalities who spread anti-vaccine conspiracy theories.

Early studies suggest the vaccinated will need a booster shot for the best chance at preventing omicron infection.