Kiran Stacey in Washington

Americans will no longer have to pay for at-home Covid-19 tests under plans Joe Biden will announce on Thursday to slow the spread of the Omicron coronavirus variant, a day after the first case was confirmed in the US.The US president will…

The race to unearth the first confirmed case of the Omicron variant in the US has been dealt a setback by laboratory closures over the Thanksgiving holiday, according to the chief executive of the world’s largest gene sequencing company.…