William Beveridge

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Epidemics that were probably influenza have been reported throughout recorded history. There were 13 fairly severe epidemics during the 18th century and 12 during the 19th century. Probably 8 of these 25 were influenza pandemic. In the 20th century there have been 4 pandemic (1918/19, 1957/58, 1968/69 and 1977) due to the emergence of new subtypes of(More)