Top disease researcher Dr Anthony Fauci has told the US Senate that he "would not be surprised" if new virus cases in the country reach 100,000 per day.
Scientists in China have identified a new strain of flu that has the potential to become a pandemic.
The World Health Organization (WHO) has warned the worst could still be to come in the Covid-19 pandemic.
The EU has named 14 countries whose citizens are deemed "safe" to be let in from 1 July, despite the pandemic - but the US, Brazil and China are excluded.
The US House of Representatives has passed a sweeping police reform bill that currently has little prospect of becoming law amid partisan gridlock.
New York, New Jersey and Connecticut have asked people travelling from states where Covid-19 cases are rising to go into self-isolation for 14 days.
The US has recorded more than 2.3 million infections and 121,000 deaths to date, the highest number in the world on both counts. States started to ease Covid-19 restrictions in mid-May, but the first wave of the epidemic seems far from over. Infections are on the rise nationwide once again. Here are the latest developments:
North Korea has suspended plans for "military action" against South Korea, according to state media.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.