Cough, cough , choke, cough...
🧠 These people are stupid!
BTW, my vaxx worshiping coworker had to go home early this week. Or should I say weak, his immune system is shot. He's sick and said he had to go home. Coughing and choking in some cases? We asked are you OK, but he was struggling to (not) cough. Now is the inflection point. He can't lose anymore sick time and is trying to hide that he's sick? By company policy (hate that word) if he's sick he must test himself and report his status. Then he must ware a mask for 14 days. Remember when everyone was Bragging about having covid and testing themselves over, and over again. Virtue signaling their status to everyone. It's not that way anymore, now they are hiding.
HIPAA is effectively GONE since obamacare. That's another consequence of that law they don't talk about.
Regardless if HIPAA is still in play and if OP is not the employer or superior he can ask whatever he wants to ask. The person doesn't have to ANSWER, no law against being nosy. If there was the jails would be filled with Karen types.
Looking at it another way, there are plenty of employers, services and venues asking for proof of vax status. This proves HIPAA is gone. And, it also makes it perfectly fair and permissible to ask anyone about anything.
"how are those anal polyps?" "hows the syphilis coming along?" "having a hemorrhoid flareup today?" "are you taking dementia meds because I think you should." "Oh, John died suddenly over the weekend? Was he fully jabbed and boosted?"
Now, if OP is a straight white male he might not be able to say anything to anyone other than a straight white male nowdays, but that's a whole other topic.