President Joe Biden on Thursday laid out his strategy to fight the Omicron and Delta coronavirus variants over the winter, including free and insurer-funded at-home Covid-19 testing and new requirements for international travellers.

The US government will require private health insurers to reimburse their 150 million customers for the cost of over-the-counter, at-home Covid-19 tests, administration officials said, and make 50 million tests available free through rural clinics and health centres for the uninsured...