Thanks for reading my work. I appreciate your comment too. :)

Based on earlier reports, the viral loads seems to peak during the first or second week of infection. But what differs between the mild and severe cases is that in mild cases, the virus is usually cleared off within 10 days. Whereas in severe cases, the viral load continued to be high during the third and forth week from disease onset.

Nevertheless, despite the high viral load, it is unsure whether the viruses are viable and infectious; since the viral detection were mainly done using RT-PCR. And a few studies that actually tried to culture the virus from covid-patients failed to do so with virus samples collected after 9 days since symptoms onset—which means that the virus were not infectious.

As for your second question, that might be referring to the case of long-covid — the persistence of symptoms after recovering from the coronavirus infection.

In case you'd like to know, here are some of the resources I've referred to:

1)https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7190077/

2)https://www.thelancet.com/journals/lanmic/article/PIIS2666-5247(20)30172-5/fulltext