This is likely to mean immunity levels decline and raises the risk of reinfection, researchers say.
Coronavirus: Europe's daily deaths rise by nearly 40% compared with last week - WHO
Intensive care units are now beginning to fill, the World Health Organization tells the BBC.
Covid has thrived on racial discrimination, says Baroness Doreen Lawrence
Labour's review says ethnic minorities are "over-exposed" and have worse healthcare than white people.
Skin cancer: How do I check my moles for signs of melanoma?
Influencer Molly-Mae Hague, 21, is raising awareness about skin cancer among young people.
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