I received the small pox vaccine about two weeks ago. I also regularly take the pill. In addition, i received the Anthrax and Hep B vaccines </font color> . In the meantime, my boyfriend and I have been having a lot of unprotected sex. So the concern is, Does the smallpox vaccine reduce or eliminate the effectiveness of birthcontrol pills like taking an antibiotic? Because if that's the case, I may be in trouble.