MedGadget does an experiment and finds out they dominate the search engine:

To see what’s going on, one does not have to go far. Goggle’s search for ‘vaccination’ returns 10 results on its first page. Of them, two are from the CDC (Centers for Disease Control and Prevention). One result from Wikipedia that has some questionable statements , such as “…the overall effect might, in theory, be to cause more deaths than before the vaccination was introduced.” The remaining seven results are from vaccination-haters and moonbats that accuse governments, pharmaceutical companies, the medical lobby, you name it, of untold millions of dead children. The second page of the vaccination search is even worse.

If you wish to refine your ‘vaccination’ search to see results from the medical authorities, you get whopping 54 results. Alternative medicine search returns 942 results. Strong medicine by peasants for peasants, as we say around here.