The polio vaccine was developed by Jonas Salk in 1955.
✓ TRUE FACT
Salk’s inactivated polio vaccine was introduced in 1955, dramatically reducing polio cases where widely administered. Large immunization campaigns in the following decades prevented millions of paralytic cases worldwide.
🤯 "The polio vaccine was developed by Jonas Salk in 1955. A breakthrough that saved millions—and charged no patent."