SOUTHFIELD, MICH (WXYZ) - While many people regard spring as prime pollen season, another type of pollen likes to wreaks havoc in the late summer and fall. It's called Ragweed, and it usually reaches peak levels in mid-September.
Ragweed pollen can cause seasonal allergic rhinitis (more commonly known as hay fever), and affects as many as 23 million Americans.
There are 17 species of ragweed in the United States. They typically bloom and produce a fine-powder pollen from August through November.
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