• TSA says 1.28m travellers passed through US airports on Sunday
• Anthony Fauci: ‘We very well might see … a surge upon a surge’

Public health experts are cautioning the US to brace for another Covid-19 surge following holiday travel, as the virus continues to spread unchecked throughout the country.

Related: Coronavirus live news: UK reports record 41,385 new daily cases; UK and South African variants now in Finland