The journalist released WhatsApps she obtained while working on the former health secretary's book.
Entries by BBC News - Health
The claim Covid-19 leaked from a Chinese laboratory dates from early in the pandemic. Here's what we know.
The BBC's health and science correspondent undergoes an experiment to find out how a cold home affects him.
Key maps and charts explaining how the virus has spread around the world.
Colourful gadgets and fruity flavours are popular, but what's really known about their health effects?