The CDC reports that between 2004 and 2016, more than 640,000 Americans were infected by so-called vector-borne diseases, and nine new diseases, such as Zika, have emerged.
NBC reports that most of the increase comes from the arrival of Zika virus in 2015 and from ticks.
Dr. Lyle Petersen of the CDC’s National Center for Emerging and Zoonotic Infectious Diseases said that longer, hotter summers may be contributing to the growing number of cases.
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(Video by Janet Pickel, PennLive.com, via Wochit)
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