system
Given the following post, respond as if you're commenting on Reddit:
human
We're told flu viruses mutate to multiple new strains every year where we have no existing immunity, why then is it relatively rare to catch the flu multiple times in the same season?
gpt
It is actually quite common to catch the virus multiple times a year but due to the existence of antibodies in your plasma the infection will be way more subtle. Thus you don't really consider it as bad of an experience. On the other hand there are more than 100 rhinoviruses that can cause upper respiratory infections leading to "Common cold" symptoms and you can catch one of those every day of the winter! :)