From Forbes
A modified virus, adenovirus 5, is being used in four COVID vaccine candidates. It has been previously used in HIV vaccines, which were found to increase the risk of of contracting HIV.
And more from Science Mag: Could certain COVID-19 vaccines leave people more vulnerable to the AIDS virus?
As if we needed another reason to avoid a coronavirus vaccine. Moral of the story: if you reside in the non-vulnerable population, get COVID, not the vaccine. This will protect the vulnerable far better than whatever is being cooked up in Pharma labs.