Fans in Toronto scream during a visit by The Beatles on Sept. 7, 1964.
(Fox Photos/Getty Images)Teenage girls were most susceptible to the pandemic and side effects included stamping, weeping, fainting, and screaming. When The Beatles played New York's Shea Stad
A tearful fan pleads with a policeman to deliver her fan button to Ringo, at an Indiana State Fair show in Indianapolis on Sept. 4, 1964.
(AP Photo/Bob Daugherty)
New York City, Aug. 27, 1964.
Seattle Center Coliseum on Aug. 24, 1964.
(William Lovelace/Express/Getty Images)
New York City, circa 1964.
Ernst-Merck-Halle in Hamburg, Germany, on June 26, 1964.
(AP Photo/Heinz Ducklau)
Welcoming The Beatles as they arrive in New York City in February 1964.
The audience at the The Ed Sullivan Show on Feb. 9, 1964.
(Central Press/Getty Images)
Comiskey Park in Chicago on Aug. 20, 1965.
A concert in Philadelphia on Aug. 16, 1966.