These maps show when pollen is most likely to be a problem in different parts of the United States. You can use them to find out when you're likely to have symptoms of hay fever. And then you can take steps to avoid pollen as much as possible and help yourself feel better.

These pollen maps are used with permission from the American Academy of Allergy, Asthma and Immunology. You can visit its Web site at http://www.aaaai.org.

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