Boris Johnson says "I share people's frustrations" at the turnaround times for results.
NHS workers are donating blood samples to find out why some of them contract Covid-19 when others don't.
Hundreds of people painted pictures of the veteran and now they're being auctioned for his charity.
By Angie Brown
BBC Scotland News
Lipoedema is a condition which can cause fat to build up in legs and arms.
By Lesley Anne McKeown
BBC News NI
By Michele Paduano
BBC Midlands health correspondent
The £500k trial could eventually carry coronavirus samples and tests between hospitals and labs.
By Rachel Schraer
By Michael Buchanan
Social affairs correspondent, BBC News