For months, the researchers warned it could still be silent carriers of the disease that people without COVID-19 symptoms to do so, it will take a lot more difficult, the sub pandemic to gain control and that much more important precautions such as social distancing and wearing a mask, even if you feel well. So it’s no surprise when Maria Van Kerkhove, the World Health Organization (WHO) “very rare.” He said the technical director for COVID-19, at a press conference on June 8 that asymptomatic transmission appears to be his statement came a few days according to the organization healthy people in areas with widespread community transmission fabric to wear masks to help the public face, the progress of the disease contain live addressed. wanted to suggest in an interview with the aftermath of the press conference, Van Kerkhove did not say that asymptomatic people can not spread COVID-19 “I did not say, is not able to transfer that asymptomatic cases, he can,” says Van Kerkhove. is “The issue is not it? And if they do, how many times did it happen?” Van Kerkhove says, but not the analysis of the WHO suggest symptomatic people for most transfer charger of responsibility a clear answer. (Even during a conference 9 in June made it clear that his comments were in response to a question from journalists, and not WHO official policy.) The WHO put their thoughts on face masks in his ultimate guide, which was released on June 5, and was based on a series of reports that COVID-19 joint distribution and transmission dynamics and results not yet published by tracking relations contact examined some that United States. Few of the studies cited explicitly examined the rates of transmission from asymptomatic population level. One, a preprint (which is not peer-reviewed) research contribution to the published site MedRxiv June 4, analyzed four previous studies (two public and two Preprint), estimates of asymptomatic transmission rates. The highest estimate was a transfer rate of 2.2%, suggesting “asymptomatic spread is unlikely to be a major engine or transmission of infection cluster community.” The WHO also guide notes that some studies that asymptomatic transfer test was to have found a small sample size that would make its results less statistically significant. Also, she said that WHO, some of these studies were not to rule out alternative explanations, some patients were infected with the virus by touching a contaminated surface as well. But just last week, researchers at the Translational Scripps Research Institute has published a paper estimated that asymptomatic individuals on behalf of up to 45% of the Crown case, and found that “has a viral load of these asymptomatic subjects were equal in symptomatic individuals thing which suggests similar potential for transmission of the virus. “One of the study’s author, Scripps director Dr. Eric Topol, criticized the wHO statement on Twitter that writing” do not include several studies [wHO] Summarized income that the data scattered meet here. ” Carl Bergstrom, a biologist at the University of Washington, wrote on Twitter that the conclusions of which were based on “thin evidence”, at least if you take into account what has been publicly released. Bergstrom also said the organization should have clearly distinguished between people who “really” asymptomatic, those who show no symptoms and those who unknowingly spread the disease in the days before they become symptomatic. Topol study found that few of transportation asymptomatic positive test people to go without symptoms for their development, but studies suggest that it takes an average of five days after exposure to the virus for symptoms surface. People would at this point be considered as pre-symptomatic, is asymptomatic, but it’s hard to tell the difference. “Although the truly asymptomatic spread is the pre-symptomatic transmission very rare likely to be important,” Bergstrom wrote on Twitter. “We still have to wear masks and distance to avoid the spread of the virus at this time, probably concentrated in days after infection. 3-6” acknowledged Van Kerkhove that the distinction when he said with time after the press conference, adding which can be difficult to distinguish mildly symptomatic asymptomatic person. Some people mild symptoms-such as fatigue can not or muscle pain associated with COVID-19, but these people had to be symptomatic on technically and able to spread the virus, Van Kerkhove tells how. With so much uncertainty, Van Kerkhove says more research is needed on transmission patterns and asymptomatic carriers. She says that people should continue public health following warning as wearing face masks tissue when social distancing can not and should stay home if they feel uncomfortable. to do so, combined with a robust contact tracing and isolation of people with the symptoms, keep COVID-19 help propagation control, he says. “We exclude nothing,” says Van Kerkhove. “We do not say that [the asymptomatic spread is] not happen. But we say more transmission from symptomatic individuals happens. People are looking for a binary, and who is not.” Bergström was more direct. The WHO statement “seems people spread hit without symptoms COVID19” Bergström tweet. “This means that buyers, students, protesters, etc. do not need masks / away? No.”
Unpack the new controversy in asymptomatic COVID-19 gearbox
