Untrustworthy sources...

These are sites that make a strong case against the use of vaccines for reasons that are not supported by science or medicine. I call those untrustworthy. I have also heard of them described as as lying or misrepresenting the truth for some sort of personal gain.

The statements presented as fact are often not and they seem to be written only to support a foregone conclusion rather than to present a balanced case - in many instances there is clearly another side to their case; usually it is the side backed by a large body of scientific observation and evidence that has not been discussed or referenced. 

You can't ignore the science - but you can always question it and devise ways to improve upon what is known.

Vaccine side effects
Last checked: 31JAN2017 AEST.

• Argues against the use of vaccines. Attempts to re-write history. Blogs without referencing statements. Selectively picks facts and forms unbalanced arguments. Sells a product(s). No evidence of medical or scientific training.
• http://www.vaccine-side-effects.com/

SaneVax, Inc.
Last checked: 12FEB2017 AEST.

• Argues against the use of vaccines despite suggesting they are for "Safe, Affordable, Necessary & Effective vaccines". Appears to steers away from positive vaccine promotion. Blogs prefer mainstream media sources to scientific ones. Selectively picks facts and forms unbalanced arguments. Seeks donations. Claims to provide an HPV testing service.
• http://sanevax.org/