Here's the edit where all of that was put in on November 30, 2020, supposedly by a student:
https://en.wikipedia.org/w/index.php?title=Myocarditis&type=revision&diff=991615852&oldid=991311466
At least for now Wikipedia keeps a public history of all the edits.
Here are all of the user's contributions:
https://en.wikipedia.org/wiki/Special:Contributions/Cailen1
The Myocarditis edit was their last edit. That huge edit history you see was to talk pages. If someone wanted to make an account look legit this would be a good way to do it. The account was active for only two months.
(post is archived)