The U.S. Food and Drug Administration (FDA) approved Truvada for PrEP use to prevent the spread of HIV.
Taking place on the 25th anniversary of the passing of the Orphan Drug Act, the very first Rare Disease Day is observed in numerous European and Canadian nations.
The Orphan Drug Act was passed to facilitate development of drugs for rare diseases.
Nine-year-old Joseph Meister, who had been mauled by a rabid dog, was the first human to receive this vaccine.
Edward Jenner, a country doctor living in England, performed the world's first vaccination saving potentially millions of people from smallpox.