> Maximum shedding duration was 83 days in the upper respiratory tract
So covid-19 is transmissible for up to 83 days once infected?
So covid-19 is transmissible for up to 83 days once infected?
"Although SARS-CoV-2 RNA shedding in respiratory and stool samples can be prolonged, duration of viable virus is relatively short-lived. SARS-CoV-2 titres in the upper respiratory tract peak in the first week of illness. Early case finding and isolation, and public education on the spectrum of illness and period of infectiousness are key to the effective containment of SARS-CoV-2."
> no live virus was isolated from culture beyond day 9 of symptoms despite persistently high viral RNA loads.
> This finding is supported by several studies demonstrating an association between viral load and viability of virus, with no successful culture from samples below a certain viral load threshold.
So the amount shed is too low to infect anyone beyond 9-10 days (I think, I am not a virologist, etc.)
Is it possible to acquire immunity against the virus (in a similar way that vaccines work) by being in contact with someone at say day 20+?
There is also a similar theory that cloth masks might have the unintended positive side effect of building immunity. They are not perfect, so the virus might still reach its target. But the viral load could be reduced enough that instead of infection it leads to immunity.