President Donald Trump, under fire over his handling of the coronavirus epidemic, announced that the federal government would ship 150 million rapid tests to U.S. states and warned an increase in positive cases is likely in the days ahead.

A top U.S. health official told a U.S. Senate committee that he expects Covid-19 vaccinations to take place over many months and that most Americans could be vaccinated by July 2021 at the latest.

The U.S. Centers for Disease Control and Prevention (CDC) asked state public health officials to prepare to distribute a potential coronavirus vaccine to high-risk groups as soon as late October, documents published by the agency showed.