Coronavirus has mutated to become far deadlier in Europe than the milder strain that made its way to the US west coast, Chinese study claims

There could be as many as 30 different strains of coronavirus, a study of patients in China has claimed.

Zhejiang University scientists studied a small number of patients with the disease and uncovered tens of mutations – 19 of which had never been seen before.

Some mutations boosted the virus’ ability to invade cells in the body, others helped the disease multiply more rapidly.

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