Many vector-borne diseases are transmitted by mosquitoes. Mosquitoes are cold-blooded insects, which means that environmental conditions, in particular temperatures, regulate their metabolism, development and activity. For instance, mosquitoes develop faster when it is warmer (provided temperatures aren’t too extreme). Given current and projected warming, most of the micro-environments that mosquitoes exploit will be well within the range that not only allows mosquitoes to live, but to develop quicker. And as mosquitoes develop more quickly, they are more effective at transmitting diseases.
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Source: Phys.org