Husband comes home from work saying he was told to practice safe sex for 3 months.

My husband works in the medical field, he told me he was giving flu shots today and accidentally stuck himself with a used needle, and was going in for a blood test to make sure he was good. I was told after it happened in the morning, as well told he was headed to get a blood test done, which I don’t know if that what he did do cause I was at work. At lunch on his break he went to the hospital, I would assume to get it done but then why say he did it in the morning an I feel like that’s something urgent to get done. Doesn’t say much about it during the day other then him getting in trouble for it, an having to get counseling for it, in regards to the safety of himself within the workplace. But that was it. Then when I get home he says he was told to practice safe sex for 3 months to be safe. Normally I wouldn’t think much of it, cause it does make sense. Yet we have currently been having some issues in that department. That he always seems to be “too tired” till the next morning to tell me “well I want to but..” basically I wanna know from any medical people if this is a thing that happens, and I’m reading too much into it due to past stuff. Or is he making it up..