I saw a news article says; 90 days after the infection with ncov19, several patients had no detectable antibodies in their bloodstream. This seems to be one of their evidence that immunity against ncov19 does not last long.
However, as mentioned in this thread, I thought that the antibody titer in the blood would typically drop within a few months after the first infection.
So, I'd like to know the time course of blood antibody titers after infection.
(1)How long does the high antibody titers last after the infection with the virus which causes ncov19? (In 1st infection, 2nd and subsequent infections)
(2)What example viruses have high antibody titers that last longer? Why does a high antibody titer last longer if such a virus?
We have received feedback that the question is broad. Therefore, examples of welcomed responses are provided below.
Examples of welcomed responses
- Viruses of interest in animal studies with fully controlled transmission are A, B, and C. A showed high antibody titers for XX months at the first infection and for life at the second...
- Post-infection antibody titers evaluated at years X, XX, and XXX for patients with evidence of viral D...
- This antibody is produced by XX.
On many stacks, discussions specific to ncov19 seems to be in progress. Therefore, I would like to discuss here from a perspective other than ncov19.