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What Has Led to the Doubling of the Number of Cases

Question 7

Multiple Choice

What has led to the doubling of the number of cases of dengue fever every decade since 1990?


A) The increase in the number of mosquitos from the Aedes aegypti and Aedes albopictus species
B) The extension of tick season
C) The increase in tick hotspot states
D) The increase in the number and geographic range of both fleas and ticks

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