Recalled on the fact that it contains pig virus DNA. One of two things happened here. One, the pig virus material has always been in the vaccine but has just recently been able to be detected (better testing, etc.). In which case, the vaccine should be recalled. Two, when it was tested previously, the material didn't exist and now for some reason, it does exist... In which case, it should be recalled until further studies are done. Unless you know of safety studies of pig virus DNA in vaccines that you can link to...? My "riddle" was in response to your "riddle" because the only way to respond to a nonsensical riddle is of course with another riddle. Got it? But yes, it was directed towards Dr. Offit.