Dr. Dolores Mercedes Piñero, (1892–1975) was one of the first four Puerto Rican women to earn a medical degree. She was also one of the first civilian doctors, and the first Puerto Rican female doctor to serve under contract in the U.S. Army during World War I. During World War I, Piñero helped establish a hospital in Puerto Rico to attend soldiers who had contracted the Swine Flu.