SARS-CoV-2 is easily transmitted from person to person. Optimal control of COVID-19 depends on resources and measures to
The researchers believed that the peakinfectivity occurs at the median time of symptom onset. According to statistics, 30% of those infected with coronavirus have no symptoms at all. Moreover, their contagiousness is 75%, the same as for those who have symptoms.
Therefore, scientists initially thought thatAsymptomatic coronavirus carriers can infect others in 24% of transmission cases. But it turned out that in fact, 59% of all cases of coronavirus transmission occurred from asymptomatic carriers, of which 35% were from people who were sick but had an asymptomatic course of the disease, and 24% from people who could not possibly suspect they had coronavirus at all.
Wearing masks and social distancing givespeople the opportunity to protect themselves and, in case of infection, reduce the risk to themselves and others. These measures can also be complemented by strategic testing of people who are not sick, for example, through contact tracing or at high risk of contamination of others (staff in the institution or people who have frequent contact with people). To combat SARS-CoV-2, numerous measures are imperative that effectively reduce the risk of transmission in the absence of symptoms.
These results show that measures such asmask wearing, hand hygiene, social distancing and strategic testing of people who are not sick may be the basis for slowing the spread of COVID-19 until safe and effective vaccines are available and widely used.
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