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Throughout thePandemic of Covid-19We had trouble following the evolving guidelines for disease control and prevention centers (CDC) and the World Health Organization (WHO), as they work to slow the spread of the new coronavirus. There is always so much that we do not know the virus and we learn new things every day - some of which even contradict previous information. The latest WHO news, however, are particularly Jarring because it seems to go against so many things we have come to believeCOVID-19 transmission. According to new data,Who now says coronavirus asymptomatic transmission is "very rare".

"Data we have, it always seems to berare that an asymptomatic person actually transmits to a secondary person "Maria van Kerkhove, PhD, responsible for the emerging diseases of WHO and the Zoonose Unit, told a United Nations Briefing on June 8 "it's very rare."

These remarks are consistent with theFacial mask guidelines that released On June 5, who stated: "Complete studies on the transmission of asymptomatic individuals are difficult to carry out, but the available evidence of the traceability of contacts reported by the Member States suggest thatIndividuals infected by asymptomatically are much less likely to transmit the virus that those who develop symptoms. "

If that's true, it could change everything from our collective response to coronavirus. So much of the way we managed the pandemic - from the widespread use of facial masks to social distancing measures to school closures - was founded on the belief thatIndividuals without symptoms can always transmit the virus. And all that does not deny the possibility of asymptomatic propagation, they certainly minimize it.

Van Kerkhove also minimized the number of really asymptomatic cases. "The other thing we are seeing is that when we come back and say," How many of them were really asymptomatic? "- We discover that many have a really light disease," she said. "They are not'Symptoms of COVIDWhich means they may not have yet developed fever. They may not have had a significant cough, or they may not have any shortness of breath, but some may have a light disease. "

It is important to note that Van Kerkhove's remarks and current WHO guidelines that contradict previous CVIV-19 propagation reports. In May, the CDC stated that 35% of people with coronaviruses never develop symptoms and felt that40% of infections came from asymptomatic supports. Other studies have placed theAsymptomatic coronavirus rate at 80%.

In their mask instructions of June 5, which admits that the viable virus has been found in asymptomatic and pre-stores, which means that transmission is possible. The organization also recognizes that previous studies seemed to show significant rates of asymptomatic and pre-symptomatic propagation. But, which concludes: "The data available, to date, on a final infection without symptoms comes from a limited number of studies with small samples subject to possible recall bias and the transmission of Fomite [ Infection to touch an object with a viral object of the particles on] can not be excluded. "

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It is also important to distinguish between asymptomatic people (those who never develop noticeable coronavirus symptoms) and pre-symptomatic people (those that are infected but have not yet developed symptoms). The estimate of the CDC40% of transmissions from people without symptoms Includes asymptomatic and pre-stores. While Van Kerkhove mentioned pre-symptomatic people in his remarks, she mainly used the asymptomatic term.

But who seems to confuse the two terms, suggesting that the vast majority of people who spread coronavirus are thosewith Symptoms of COVID19. "What we really want to be focused on symptomatic cases," said Van Kerkhove. "If we followed all symptomatic cases, isolated these cases,Follow-up Contacts And quarantined these contacts, we would radically reduce [propagation]. "

So, does it mean that you should come back to the life of your life as you have pre-pandemic and simply self-isolate if you feel sick? Not so fast. With new information about coronavirus emerge daily, the last report of which is only one piece of data to keep in mind while evaluating personal risks. At the same time, if more education suggests that asymptomatic propagation is a real scarcity, national guidelines can change accordingly. And for the current CDC guidelines to follow, here is here5 things that the CDC says you should still not do.