I was just kidding. I guess I meant that as with all vaccines I assumed that you had to receive all doses (and perhaps a short time after that) for it to take effect. From what I have read there are months between doses. I have received the old vaccine so I am covered to some extent, however that vaccine had only 70% or below effectiveness in most cases to begin with and time has gone by. So, my mind would have some ease while I received the new vaccine. I guess what I meant by fairly stupid comment is that Hepatitis A (from what I understand) can be contacted by being exposed to contaminated feces. Hepatitis B, on the other hand, can be contacted by exposure to infected blood and body fluids. The chances of infection are low but who knows. At any rate, like PrEP, this gives some protection.