Citat:
Ursprungligen postat av
Siix
Är den gamla tesen om den asymptomatiska smittan tillbaka? Det som skulle vara så speciellt med detta viruset, då det skulle vara en av de egenskaperna som det skulle ha givits i labbet. Har dock inte hört om detta på ett tag. Men kan naturligtvis ha missat det? Intresset har svalnat lite....
Du vet att det där googlade jag på och det är tydligen så att asymptomatiska personer smittar.
Citat:
What would be the difference between early and late-stage asymptomatic cases? The above review compared their virus dynamics [[8]]: Although, RNA detection was shorter after oligo/asymptomatic disease in 5 of 11 studies, there was no such difference in the other studies. Also, viral loads were similar (four studies) or lower (two studies) in asymptomatic compared to symptomatic cases, both peaking within days after infection. Thus, similar virus dynamics suggest that there may not be much difference in levels of viable virus between symptomatic and asymptomatic individuals, within the early days after infection, when most AIC transmission studies were done. Thus, it is not surprizing that AIC were found to be infectious, even if to a somewhat lower degree than SIC.
During later stages of the disease, symptomatic patients recover and clear the virus, but a very small number continue to produce virus for several months: In Wuhan 310 per 100.000 recovered patients did not clear the virus even after several months. As reviewed above, AIC clear the virus faster. In Wuhan only 3 AIC per 100.000 (i.e. 100 times less) continued to harbor virus and, as the study showed, at this later stage of the infection none of these long-term carriers were still infectious.
Thus, we suggest that asymptomatic individuals are infectious during the early stage of infection, but some rare cases (3/100.000) become long-term virus carriers which are no longer infectious.
https://www.thelancet.com/journals/lanepe/article/PIIS2666-7762(21)00059-4/fulltext
