system
A chat on subreddit /r/NoStupidQuestions
human
Also the more people who get the virus, the more chance the virus has of mutating. The further it mutates away from the original, the less effective the vaccine could be with dealing with it.

So as a whole, everyone is worse off if more people don't get vaccinated. It's for the greater good of society to get vaccinated.
gpt
There was a lot of misunderstanding (and still is) over this in the UK; early on a few of the usual gutter-feeding news shows and outlets gave platforms to people saying that mutations led to less-harmful effects. 

These were since deleted but their message was constantly repeated by those convinced by it.