US coronavirus deaths topped 80,000 on Monday, according to a Reuters tally, as nearly all states have taken steps to relax lockdown measures.

Deaths in the United States, the epicentre of the global pandemic, have averaged 2,000 a day since mid-April despite efforts to slow the outbreak.

Total coronavirus cases in the United States have exceeded 1.3 million with infections rising in such states as Mississippi, Minnesota and Nebraska, highlighting the risk of a new wave of Covid-19 outbreaks.