The hospital porters, cleaners, caterers and admin staff in close contact with Covid-19 patients.
Some scientists argue that it is becoming urgent to tell people with sudden loss of smell to self-isolate.
Some people in England, Northern Ireland and Scotland can form "support bubbles".
NHS bosses say they are worried seriously ill patients are staying away as visits drop by half.
The reaction is extremely rare and only affects a tiny number of children seriously.
Across the world, people are being asked to wear face coverings to help stop coronavirus from spreading.
Deaths caused by Covid-19 have led to a shortage of space in some mortuaries and delays to funerals.
Katherine Grant's friends and family hold a drive-by celebration after she was cleared of cancer.
Labour leader Sir Keir Starmer says 10,000 extra deaths in April must be accounted for, as he questions the PM.
Why is England pressing ahead with plans to ease lockdown rules ahead of the rest of the UK?
The Edinburgh University-led research will identify why the disease affects some more than others.
BBC Medical Correspondent Fergus Walsh visits University College Hospital to see how staff help rehabilitate Covid-19 patients coming out of intensive care.