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Being asymptomatic positive for the new Coronavirus means having contracted the virus, but not showing symptoms of Covid-19 disease. According to the data reported in the latest newsletter of the Istituto Superiore di Sanit, asymptomatic people are on average 56% of positives, percentage that increases to 75% among children 2 to 6 years (the percentages are similar in the rest of Europe). How do you know that you are asymptomatic? The only way to have a tampon.
Presymptomatic and asymptomatic: what is the difference
The data we have on the symptoms detected at the time of the swab do not distinguish between presymptomatic and asymptomatic. It means that a part of the population subjected to a swab (often during a screening test because they are in close contact with a positive) has tested positive shows no symptoms at the time of diagnosis, but may show them later (the average incubation time is approximately 5.5 days). The bulletin data is frozen at the time of swabbing and it is not possible to know who is really asymptomatic in all respects. Estimates of the actual number of asymptomatic patients are made with serological investigations. The one carried out by the Ministry of Health, which ended on July 27, 2020, observed an asymptomatic 27.3% of HIV-positive Sars-Cov-2 (in the municipality of Vo ‘, in Veneto, subject of the epidemiological survey led by Professor Andrea Chrysants, the asymptomatic detected were even 42.5 percent).
Are Asymptomatic People Contagious?
Because in contact tracing activity there is so important for the asymptomatic? Today we know that the maximum infectivity coincides with the moment immediately before the appearance of the first symptoms (a couple of days before). Therefore, the role of asymptomatic individuals (presymptomatic and asymptomatic) appears to be fundamental in the spread of the pandemic. One study estimated that 44 percent of infections are the result of presymptomatic people., another estimated a range of 40 to 80 percent. For this reason, the monitoring system aims to test all those who have had contact with positive subjects, to quickly identify even asymptomatic subjects who have a non-secondary role in the spread of the virus.
Pregliascus: It is correct to give priority to the families of the infected
the contact tracking because it entered into crisis due to the multiplication of cases and the Ats could no longer persecute all those who had contact with a positive (the projections in the schools have tripled the work). Today, especially in some areas of Italy, it is no longer a rarity to have had to deal with something positive. The audience of potential asymptomatic patients is expanded and the natural consequence of epidemic growth. The Regions, with water in their throats, asked to rub only symptomatic relatives and cohabitants, taking into account that the virus is transmitted mainly in the family (80% of outbreaks in the home). But then who really needs to be protected at this historic moment? You cannot rub everyone in the world, and today the request for tests seems motivated by the search for psychological comfort. Address an objective need without falling into crowds warns Fabrizio Pregliasco, virologist and medical director of the Galeazzi hospital in Milan. In the situation that we find ourselves in right to give priority to the relatives of the infected because there is very close and prolonged contact at home and the virus spreads easily. On the other hand, schools need careful evaluation. Meanwhile, help may come from rapid antigenic swabs for mass detection (has not yet arrived in Lombardy, ed). Those who test positive will be subjected to a molecular swab to confirm the diagnosis while the negatives re-enter class. Anyway from now on most students also wear masks in class would not be considered “close contacts” (who was face-to-face with a positive from less than 2 meters away, for at least 15 minutes and without wearing a mask, ed) and it’s up to the Ats to carefully decide who to clean up. Till the date school groups seem to be limited. Problems arise mainly outside the school walls: in transportation or even when students, especially older ones, see each other independently.
The rule for asymptomatic positives
Asymptomatic positives should be isolated for at least 10 days from the time the test result is reported to them. At the end of this period they must undergo a new swab: if it is negative they can end the isolation.
The rule for close (asymptomatic) contacts
An asymptomatic (therefore healthy) close contact should remain in quarantine for 14 days from the moment you had your last contact with the positive person, if the encounter had occurred in the 48 hours before that person was cleaned At the end of the two weeks you should not take a tampon, unless no symptoms have appeared in the meantime or the health authorities have asked you to undergo tests. Alternatively, to shorten the quarantine time, the close contact can be smeared after ten days from the last contact with the positive case: if the test is negative, the quarantine ends immediately; if the swab is positive, the close contact becomes officially infected and therefore must undergo actual isolation.
October 26, 2020 (change October 26, 2020 | 13:07)
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