From my reading, Cali HSC 120290 criminalizes knowingly transmitting any STD, which fits the bill for stigmatization. I'm guessing your point is it seems like transmitting any STD is a misdemeanor now, whereas in the past, only HIV would be tagged — with a felony, specifically. Right?
I'd venture that it's an adjustment with the times, specifically that HIV is no longer a death sentence especially as drugs for HIV come upon patent expiration in ~6 years time.
Still a stigma, and it still impairs a person's ability to have a normal romantic life, but it's no longer murder-adjacent.
I mean seriously, is there anyone out there who prefers getting an STD (let alone a very serious one) then getting punched in the face for example or getting your home broken into?
But doesn't California's SB 239 mean that a lot of people don't believe this anymore? And don't most people who think SB 239 was a good thing also hate people who don't want the vaccine?