This infographic shows how we know that vaccines work.
Why haven’t we eradicated measles yet? Is that the goal?
If it was better hygiene and sanitation and not vaccines that controlled disease, then why do we still have so many infectious diseases?
As most folks know, neither the DPT nor OPV vaccines are used in the United States. That they are still used in other countries likely raises some questions for those folks that get them. Why Are the DPT and OPV Vaccines Still Used in Some Countries? As I am sure you have guessed, there is …