The Foreign Office has updated its advice for those travelling to the USA amid surging covid cases in some parts of the world.
Earlier this year, US health chiefs dropped the requirement for fully vaccinated international passengers to take a coronavirus test before boarding their flights. Travellers who are not fully vaccinated will have not been able to enter the US since the pandemic began, except under extreme circumstances.
But new testing measures will come back into play from January 5, if you enter the USA from certain other countries.