cVDPV
Circulating vaccine-derived polio virus or cVDPV are outbreaks of polio that are actually caused by the polio vaccine.
VAPP
Are Fewer Than 1% of Vaccine Injuries Reported to VAERS?
While mild side effects are likely under-reported to VAERS, a large percentage of serious adverse events do get reported.
How Long Do Side Effects of Immunizations Last?
Most immunization side effects are mild and only last a few days.
Albert Sabin
In 1961, Sabin’s live, attenuated polio vaccine replaced Jonas Salk’s inactivated polio vaccine that had been in use since 1955.