Asianflu

8 clues
Malady caused by H2N2
Cause of global panic in 1957
Unwanted import from the East?
Unwanted visitor from the East
Eastern strain of the H2N2 virus
Outbreak caused by the H2N2 virus
H2N2 pandemic of 1956-58, familiarly
Viral epidemic that originated in China: 2 wds.