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The expert, Natalia Pshinichnaya, said that the concentration of Covid-19 in the upper respiratory tract is high, two or three days before the appearance of the characteristic signs of the infection, such as cough or loss of smell. And here, a person infected with Coronavirus represents the greatest danger to others.
He added that the high level of excretion of the coronavirus by the upper respiratory tract, which is observed even in those with mild forms of the disease, is considered the main sign. For infection.
The expert stressed that patients can transmit the virus actively, in the first week after infection.
The expert indicated that the ability of the patient’s body to classify the viruses that are capable of survival decreases with the passage of time, but this capacity continues within 10 days, if the disease is weak. As for the medium and large forms of the disease, this period increases and can reach 3 weeks.
In some cases, for example if the patient’s immunity is weak, their body can continue to classify viable viruses for up to 70 days. Therefore, the person who has suffered from the infection can be considered safe for others only after the negative result of the polymerase chain reaction test.
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