All the sources are there for you. Question them if you wish. A lot of work was taken to prove (which is essentially how I see it - proven) that there is little to zero risk.
Every day brings a new article on a college student dying due to blood clots or other symptoms caused COVID...
Indiana college student with COVID-19 dies in her dorm room
https://www.cbsnews.com/news/indiana-college-student-covid-19-dies-in-her-dorm-room/
The family of a 20-year-old college student who died after experiencing COVID-19 symptoms is now pleading for others to take the virus seriously. Bethany Nesbitt, a student at Grace College in Winona Lake, Indiana, was found dead October 29 in her dorm room after having COVID-19 symptoms for about 10 days and awaiting a test result, according to a statement from her family.
"The cause of death was a pulmonary embolism — the result of a blood clot — widely recognized as a common cause of death in COVID-19 patients," her brother Stephen Nesbitt tweeted.
(More at above url)