There is no way to accurately predict the course of influenza epidemics.

He was also concerned about the influenza epidemics and studied the virus involved.

Smoking may substantially contribute to the growth of influenza epidemics affecting the entire population.

And the concern is even greater when the event occurs in southern China, the source of many of the world's great influenza epidemics.

There were two influenza epidemics, first in 1918, and again in 1927, which created many orphans.

Surveillance focuses on Asia because many of the recent great influenza epidemics have arisen there.

The three largest influenza epidemics of the 20th century are believed to have started in birds.

His initial hypothesis proposed that the cause of influenza epidemics during winter may be connected to a seasonal influence.

Annual influenza epidemics are estimated to affect 5-15% of the global population.

The center attributed the decline primarily to the two influenza epidemics of 1993.