Young and healthy people, who had never suffered a COVID-19 infection, were intentionally exposed to this disease to discover how the virus works in the body, revealed a study published by the United Kingdom.
During the clinical trial, scientists administered a dose of the virus to this group and the results showed that the incubation period takes 42 hours, that is, it is shorter than the current estimate, which is 5 to 6 days.
The experts even concluded that a single nasal drop from a patient infected with coronavirus is enough to infect another person, in addition to the fact that the symptoms begin to develop very quickly, two days after infection.
The infection first manifests itself in the throat and the virus peaks at five days, at which point the nose has a much higher viral load than the throat.
In this clinical analysis, prepared by The Human Challenge, 36 volunteers participated, men and women, between 18 and 30 years old, who were not vaccinated against the virus and had not had previous infections by this disease.
Of this total, 18 became infected, and of this group, 16 developed mild to moderate cold-like symptoms such as a blocked and runny nose, sneezing, and sore throat; others had a headache, muscle and joint pain, tiredness, and fever, but none developed severe symptoms.
“First and foremost, there were no serious symptoms or clinical concerns in our model of infection in healthy young adult participants,” said Christopher Chiu, from the Department of Infectious Diseases at the Institute of Infections at Imperial College London.
He also explained that antigen tests are reliable for detecting the presence of SARS-CoV-2.
How often should you change your face mask per day?
In COVID-19 times, the mask is a fundamental weapon to avoid contagion, especially in public spaces, work centers, study or inside home.
Therefore, one way to reinforce the virus protection It is to use the mask correctly, that is, to perfectly cover the nose and mouth, in addition to changing it once it has lost its effectiveness.
According to María Isabel López López, head of the IMSS Nursing Technical Coordination Area, it is recommended that the three-layer face mask replaced every four hours, when it is already wet and, in the case of N95 and KN95They can last for a whole working day.