Circulating vaccine-derived polio virus or cVDPV are outbreaks of polio that are actually caused by the polio vaccine.
Vaccine Side Effects
What does it mean if you develop a rash after getting the chickenpox vaccine?
Large local reactions to vaccines, although sometimes scary looking, are not dangerous, do go away, and are not a reason your pediatrician should typically tell you to skip or delay your child’s vaccines.
Most immunization side effects are mild and only last a few days.