Lynx, Destroyer of Worlds (with Science!) (lynxreign) wrote,
Lynx, Destroyer of Worlds (with Science!)

It isn't because you forgot your hat.

From Scientific American:

Influenza spreads most readily in winter, but crowding and closed windows have nothing to do with that seasonality. Rather cold air and low relative humidity seem to do the trick. Researchers found that infected guinea pigs kept at five degrees Celsius shed the bug for 40 hours longer than those kept near room temperature. The virus was most stable at relative humidities of 20 to 40 percent: dry air leads to smaller water droplets on which viruses are carried, enabling them to remain airborne for long periods. In the cold, cilia in the respiratory system work more slowly, enabling the virus to spread in the respiratory tract and to disperse in a sneeze or a cough.

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