Volunteers and relatives of bereaved paint hearts along a wall beside St Thomas' hospital as a memorial to all those who have died so far in the UK from COVID-19, amid the spread of the coronavirus disease pandemic in London, Britain, March 29, 2021. (Photo/Agencies)

A health worker from St Thomas' hospital stands behind a wall being painted in hearts as a memorial to all those who have died so far in the UK from COVID-19, amid the spread of the coronavirus disease pandemic in London, Britain, March 29, 2021. (Photo/Agencies)

Volunteers and relatives of bereaved paint hearts along a wall beside St Thomas' hospital as a memorial to all those who have died so far in the UK from COVID-19, amid the spread of the coronavirus disease pandemic in London, Britain, March 29, 2021. (Photo/Agencies)

Volunteers and relatives of bereaved paint hearts along a wall beside St Thomas' hospital as a memorial to all those who have died so far in the UK from COVID-19, amid the spread of the coronavirus disease pandemic in London, Britain, March 29, 2021. (Photo/Agencies)