Can i be sure that vaccine safety testing has been effective and accurate?

Yes: Vaccine safety and efficacy is done in a structured scientific environment. Testing is done to ensure the utmost of safety as well. The center for disease control closely monitors and supervises their use and application. Despite self proclaimed "authorities" on the subject who may preach the contrary, vaccine safety is reliable and accurate.

Yes: The evidence-- real, solid evidence-- for the safety and effectiveness of vaccinations is overwhelming. No other medical intervention has been studied as thoroughly by as many different researchers from as many different countries. Every legitimate medical professional organization and public health service--worldwide--attests to the safety of vaccines. There are few things you can be as sure of!