WASHINGTON: America has confirmed the first case of the highly-infectious Covid-19 variant found in the UK in the state of Colorado.

The new variant was found in a male patient in his 20s with no recent travel history, said state health officials.

The new variant is considerably more transmissible than previous strains but not necessarily any more dangerous for those infected, experts say.

US health officials said last week that they believed it was already in circulation in the country.

The US has recorded more than 19 million infections and more than 337,000 deaths from coronavirus, the highest figures in the world. (With inputs from Agencies)