Interesting answers. Thank you all

1. HIV attacks the immune system itself, it uses our mechanisms of defense to spread, that is why is difficult to make a vaccine. PLUS

2. The genetic variety of corona in one country on the third month of the pandemy is equivalent of the variety in ONE person with HIV, so it is difficult to find a viral marker to develop some immunity.

Covid-19 vaccines were not developed from the scratch, they have the same basis of the sars and Mers that are other corona viruses already known that have high mortality but spread slower.

HIV's characteristic rapid mutation makes it very difficult to develop an effective vaccine against. You may be infected with one strain, and by the time you pass it on its already mutated.

There's a once-daily tablet (Biktarvy) that keeps HIV symptoms under control and does so well to reduce it in the blood so that even blood tests come up negative.

Here's the latest on COVID19 vaccines from a CDC scientist;

From Wikipedia:
Classic vaccines mimic natural immunity against reinfection as seen in individuals recovered from infection; there are almost no recovered AIDS patients.[citation needed]
Most vaccines protect against disease, not against infection; HIV infection may remain latent for long periods before causing AIDS.
Most effective vaccines are whole-killed or live-attenuated organisms; killed HIV-1 does not retain antigenicity and the use of a live retrovirus vaccine raises safety issues.

Very different viruses in makeup and how they work

HIV attacks the immune system.. Covid doesn't...