Vaccines, less profitable than drug and supplement sales
If vaccines were such a money maker, there'd be more companies producing them. Instead, the number of vaccine makers has declined in recent years, prompting fears of shortages (like the flu vaccine shortage in the U.S. a couple years back):
"While a number of new vaccines have been developed, there are fewer vaccine manufacturers...The global vaccine market has changed significantly over the past decade.
As new vaccines are introduced, older, less profitable ones become progessively more devalued, which in turn forces more vaccine producers to exit the market. In fact, the overall number of manufacturers of basic pediatric vaccines that meet WHO standards has declined to 4 for each of the main basic pediatric vaccines, with over-dependence for some vaccines on one manufacturer with the high risk of shortages in cases of batch failure or other delays."
http://www.unicef.org/media/media_9366.html
This report illustrates the divide between antivaxers and what concerns people in Third World countries. Antivaxers here obsess about overhyped and imaginary vaccine dangers. In these other countries, people are worried about getting enough vaccines to protect their children from diseases like measles, which still kill hundreds of thousands every year.
The worldwide total revenue for vaccine makers according to the above link was $6 billion in a recent year. By contrast, the "natural products" industry has revenues of $32 billion a year.
Drugs and supplements are a lot more profitable to make and sell than vaccines.
Education (and prevention) - not medication.