Doctors (and patients) have long known that influenza in temperate areas is more common in the winter, and that some winters are worse for flu than others. Now they know why – drier winter air keeps the flu virus alive longer and the drier the air, the more flu.
The researchers showed that higher flu deaths matched up with periods of low humidity.
The collaboration between Oregon State University, the National Institutes of Health, Pennsylvania State University, Princeton University and Harvard University also found out that flu outbreaks are more likely to start during abnormally dry periods.
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