An algorithm developed in the US has correctly identified people with Covid-19 only by the sound of their coughs.
Europe's daily Covid deaths rose by nearly 40% compared with the previous week, the World Health Organization (WHO) has told the BBC.
The story of India's first "saviour sibling" has made national headlines. It has also raised questions about the ethics of using technology to create a child only to save or cure a sibling in a country with poor regulatory systems. The BBC's Geeta Pandey in Delhi reports.
"I still have nightmares most nights about being completely out of my depth."
Stress affects the skin in various ways
A man in the United States has caught Covid twice, with the second infection becoming far more dangerous than the first, doctors report.
Scientists are looking for volunteers to take part in a trial to see if taking vitamin D can give the immune system a boost against Covid.
The virus responsible for Covid-19 can remain infectious on surfaces such as banknotes, phone screens and stainless steel for 28 days, researchers say.
Scientists in the UK have begun testing the BCG vaccine, developed in 1921, to see if it can save lives from Covid.
Thousands of scientists and health experts have joined a global movement warning of "grave concerns" about Covid-19 lockdown policies.
