US health officials made cautiously optimistic noises about coronavirus despite high death tolls, suggesting Americans might be able to take summer holidays, as falling hospitalisation rates hint at a turning point in the battle against Covid-19, AFP reported.

Trump's top pandemic adviser Anthony Fauci warned America cannot be reopened overnight due to the threat of further waves of infections, but said it could be up and running again by summer.

That is, he said, providing citizens adhere to social distancing guidelines and widespread stay-at-home orders — which have the vast majority of Americans on lockdown — throughout April.

Nationwide, the US recorded 1,783 deaths over the past 24 hours.