Hong Kong Flu (31 dic 1968 año – 31 dic 1969 año)
Descripción:
An influenza outbreak in Hong Kong between 1968 and 1969. It was caused by an H3N2 strain of the influenza A virus, descended from H2N2 through antigenic shift.
Añadido al timeline:
fecha:
31 dic 1968 año
31 dic 1969 año
~ 12 months