The speed of propagation of the coronavirus SARS-CoV-2 depends on many factors, but the key role is played by mutation. This opinion was expressed by the main infectious diseases, USA Anthony Fauci.

"On this score there is debate, but I believe that the mutation speeds up the replication of the virus and increases its concentration in the human body" – said the expert.

While not scientifically proven, that in this case the virus becomes more dangerous for the patient.

TASS recalls that the first day of July in the USA was revealed a record 50 thousand 655 cases of infection with coronavirus. All in all, the United States, SARS-CoV-2 was found almost three million people. From complications died 128 million Americans.