How the polio vaccine virus occasionally becomes dangerous
While the world reels from the spread of SARS-CoV2, the new coronavirus behind COVID-19, a much older and previously feared scourge–poliovirus–is close to being completely eradicated. The polio vaccines, developed by Jonas Salk and Albert Sabin in the mid-1950s, heralded the elimination of polio from the U.S., saving countless children from sudden paralysis and death.…