It’s at least plausible that people become less vulnerable to colds as they get older.
http://www.nytimes.com/2013/08/06/science/can-immunity-to-the-common-cold-come-with-age.html?_r=0
It’s at least plausible that people become less vulnerable to colds as they get older.
http://www.nytimes.com/2013/08/06/science/can-immunity-to-the-common-cold-come-with-age.html?_r=0