system
A chat on subreddit /r/NoStupidQuestions
human
Wouldn't say it means *nothing.* Very little is 100% effective, but vaxxed people are less likely to catch it and less contagious. Requiring cards isn't an absolute guarantee, but it does greatly reduce the spread.
gpt
Also symptom management, less serious and FAR less lethal than unvaxxed.

Now that the majority are vaxxed and our understanding/treatments are better, I keep seeing these people who got the Vax scoffing about how pointless it all is cause *they* got Covid and were fine, ignoring the fact of THAT'S THE WHOLE POINT.