Maybe ten. I’ve bookmarked everything I’ve seen posted here or run across in searches on other CV topics.
How many have you got?
Searching my bookmarks for COVID, I count sixteen, but most aren’t direct links to studies. For instance, I bookmark threads here too, the ones in which I participate or which especially interest me (e.g., “MLB legend Hank Aaron dies two weeks after getting COVID-19 vaccine”, which is more about Aaron as a baseball player — I discussed him and my childhood favorite Duke Snider).