Originally Posted by OneHungLo

In fact, vaccines were so unprofitable that some companies stopped making them altogether. In 1967, there were 26 vaccine manufactures. That number dropped to 17 by 1980. Ten years ago, the financial incentives to produce vaccines were so weak that there was growing concern that pharmaceutical companies were abandoning the vaccine business for selling more-profitable daily drug treatments. Compared with drugs that require daily doses, vaccines are only administered once a year or a lifetime. The pharmaceutical company Wyeth (which has since been acquired by Pfizer) reported that they stopped making the flu vaccine because the margins were so low.