Children and older adults are to be included in the second phase of vaccine trials to protect against coronavirus.
A trial to see whether two anti-malarial drugs could prevent Covid-19 has begun in Brighton and Oxford.
Wearing masks is being made compulsory in Spain both indoors and out in public if social distancing is not possible.
As the country's death toll surpasses 92,000, all 50 US states have partially reopened after a two-month shutdown.
More than 100 healthy babies have been born to mothers infected with the novel coronavirus in one hospital in India's western city of Mumbai.
Up to 30% of patients who are seriously ill with coronavirus are developing dangerous blood clots, according to medical experts.
Scores of UK and US children have been affected by a rare inflammatory disease linked to coronavirus.
The new coronavirus may never go away and may just join the mix of viruses that kill people around the world every year, Dr. Mike Ryan, executive director of the World Health Organization health emergencies program, said Wednesday.
Russia has confirmed 232,000 cases of coronavirus - the second highest toll in the world after the US.
New coronavirus clusters have been reported in Wuhan city - where the virus first emerged - and the north-eastern province of Jilin in China
