He's salted the earth though - antivax crowd would denounce his vaccine with as much pique and passion as they have dished on MMR. It just doesn't look like a good business plan...
Ironically, those who have lived and breathed vaccines for years (i.e. experts) seem to know nothing about that enormous trust placed in the vaccination process by the public---the public assumes it works and assumes it's there to keep you safe, but knows so little about them that even simple questions of safety will be translated into "vaccines bad."