Why mosquitos, flies are spreading more diseases in the U.S.
Hotter temperatures and more severe weather events are helping some mosquito-borne diseases spread in the U.S. Dr. William Schaffner, a professor of infectious diseases at Vanderbilt University Medical Center, joins CBS News with more.
Hotter temperatures and more severe weather events are helping some mosquito-borne diseases spread in the U.S. Dr. William Schaffner, a professor of infectious diseases at Vanderbilt University Medical Center, joins CBS News with more.
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