We've recommended humidity for treating coughs and inhaling steam to ease congestion. And now a study by Oregon researchers has found a significant link between humidity and the spread of the flu virus. When absolute humidity is low–as in peak flu months of January and February–influenza appears to survive longer and transmission rates increase, according to the Oregon State University news release.

It's not to late to get a flu shot. Contact your state or local health department or use the online flu shot locator provided by the American Lung Association to find a clinic near you.

Read more on why it's more important than ever to get the flu shot, and see our Treatment Ratings (subscribers only) for the flu.