When birth control advocate Margaret Sanger asked Gregory Pincus to come up with a birth control pill, he knew one of the hardest parts of the process would be the large-scale human trials ...

When scientist Gregory Pincus first approached the pharmaceutical company G. D. Searle about funding research for an oral contraceptive, Searle's immediate response was no. In the early 1950s ...

Background: The duration of protection after hepatitis B vaccination of infants is unknown. Methods: We determined antibody to hepatitis B surface antigen (anti-HBs) at 4-13 years of age in 363 ...