Question: are any mercury astronauts still alive?
Answer: Three of the original Mercury astronauts are still alive - Schirra, Glenn and Scott Carpenter. Virgil "Gus" Grissom died in the 1967 Apollo 1 fire; Donald K. "Deke" Slayton died of brain cancer in 1993; and Alan Shepard Jr., died of leukemia in 1998.