Thirty species of coronary have been discovered, mutated has become the deadliest in Europe.

There may be more than 30 different types of choreography, a study that has been conducted in patients in China.

University scientists Zejiang studied a small number of coronary patients and discovered dozens of mutations, 19 of which had never been seen before.

Some mutations increased the ability of the virus to invade cells in the body, others helped to multiply the disease faster.

The most deadly figures were genetically similar to those spread to Europe and New York, the South China Morning Post reported.

The authors say that their study based on only 11 patients shows that mutations can affect the severity of the disease.

They believe these mutations may be the reason for the large number of deaths in Europe and New York.

It is still not clear why the aggressive version of COVID-19 spread to Europe, and in the U.S. was hit by a softer version.

But scientists say that viruses have suffered constant mutations to overcome immune system resistance to different populations.