If you recovered or mostly recovered from a viral disease, wouldn’t you be immune? At least unless the virus mutated significantly?
Found an interesting article about that:
It’s not completely known how long a person can continue to shed the virus once the acute infection has subsided. It’s likely that the recovery from Ebola varies as much as the incubation period of the virus, which can last anywhere between 2 to 21 days. According to the World Health Organization, a lab worker who contracted Ebola on the job was found to have traces of the virus in his semen 61 days after the initial infection. Though it has not been documented, this could theoretically mean a man could infect his partner during sexual intercourse weeks after he seemed to get over the disease.
http://www.cbsnews.com/news/surviving-ebola-for-those-who-live-through-it-what-lies-ahead/
Common cold is caused by a virus. And yes, it mutates quickly. Several strains are usually in circulation at any given time, and they will change by the next flu season.
> If you recovered or mostly recovered from a viral disease, wouldn’t you be immune? At least unless the virus mutated significantly?
You mean like when you get chicken pox or a herpes virus and the virus hides out in your body and comes back from time to time?