Not really. HIV vaccine candidates as well as trials for them have existed for decades. One of the earlier ones: https://en.wikipedia.org/wiki/AIDSVAX https://e

Not really. HIV vaccine candidates as well as trials for them have existed for decades. One of the earlier ones: https://en.wikipedia.org/wiki/AIDSVAX https://en.wikipedia.org/wiki/AIDSVAX The issue is just that the trials have all failed. Since the earliest vaccines, a lot has been learned about HIV and its interactions with humans, which allows advanced approaches like this one, targeting parts of the virus that we know are highly conserved.