Explore the recorded discovery and history of Measles morbillivirus, with source links and stated limits.
Measles spreads through the air when an infected person breathes, coughs or sneezes. WHO describes a virus that infects the respiratory tract and then spreads through the body, with high fever, cough, runny nose and a body-wide rash. CDC states that up to 9 out of 10 unprotected people in close contact with someone who has measles become infected. This profile summarises possible illness; it cannot assess an individual infection.
CDC's Pink Book records that Peter Panum described the incubation period of measles and lifelong immunity after recovery in 1846. References to measles appear as early as the 7th century, long before the virus itself was known.
John Enders and Thomas Chalmers Peebles isolated measles virus in human and monkey kidney tissue culture. Isolation records scientific identification, not the first human infection.
The first live, attenuated measles vaccine (Edmonston B strain) was licensed for use in the United States. A combined MMR vaccine followed in 1971.
CDC states measles was declared eliminated from the United States in 2000. Elimination of continuous domestic spread is not global eradication, and CDC reports that US cases have been increasing since early 2025.
Written descriptions of measles predate virology by centuries, and the 1954 isolation identified the virus rather than a first patient. These references do not establish who was infected first or where measles arose.
Source check: 2026-09-19. Educational content; independent scientific review remains pending.