Some individuals may stay infectious forever. E.g. Typhoid Mary[1] was quarantined twice, and the second time she remained isolated until death. (Thypoid fever

Some individuals may stay infectious forever. E.g. Typhoid Mary[1] was quarantined twice, and the second time she remained isolated until death. (Thypoid fever is a bacterial infection, but I assume something similar can happen with a virus.) [1] https://en.wikipedia.org/wiki/Mary_Mallon https://en.wikipedia.org/wiki/Mary_Mallon