What's behind the rise in mosquitto, tick born diseases?

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The report found that during the 13-year study period, the number of reported illnesses from mosquito, tick and flea bites more than tripled, going from about 27,300 cases in 2004 to 96,000 cases in 2016. Overall, more than 640,000 cases of these so-called vector-borne diseases were reported during the study period.

There are several factors behind the increase in these diseases, the researchers said. For example, rising temperatures will tend to expand the range of ticks farther north, thereby expanding tick season, "which puts people at risk for a longer time," Dr. Lyle Petersen, director of the CDC's Division of Vector-Borne Diseases, said at the news conference.

https://www.livescience.com/62451-tick-mosquito-borne-diseases-increase.html