“who would catch the disease but get better”
They could be barely sick with the disease but still act as reservoirs of infections to weaker folks until their better antibodies boot up. These silent “typhoid marys” are what may be a threat to populations that have no qualms with behaviors where sharing body fluids is a common as breathing. The Lib progressives screamed about aids and discrimination....how would they ever handle a super ebola plague that forced the surviving populations into moral behaviors that would rival the apostles themselves?
We have the ten commandments for a reason and even if one discounts the spiritual(which I don’t!)...nature herself can apply a most brutal scourge upon froward humanity!
These folks would not be reservoirs, as after a single viral reproductive cycle beyond any illness, all the virus left in them would be dead. What their genetic anomaly accomplishes is to make their cells “slick” to viruses, so that they cannot attach themselves and burrow into the cells to reproduce. Or, they are only able to attach to a small number of cells. And this minor infection only lasts until their immune system destroys them and the cells they occupy.
Unless viruses can get into cells, they die, because the blood is very hostile to them. A breakdown product of vitamin D, for example, erodes their protective viral coat, so they break apart.
They got the first clue of this from homosexual men who were repeatedly infected with HIV, but shortly thereafter had no HIV in them. And it was the same with their ancestors, who might have been infected with the black plague many times, but were a dead end to the disease.
Bottom line, they would not be reservoirs like Typhoid Mary.