system
A chat on subreddit /r/NoStupidQuestions
human
Well the covid vaccine was created to tech your body how to combat the sars-cov-2 virus and had been worked on starting with sars-cov-1 in the early 2000's.

ALS and Parkinsons are not caused by a virus so its a lot harder to create a way to train your body to "fight" something off that's not caused by a foreign intruder
gpt
Ty!