What You Need to Know About Dengue Fever

An outbreak of dengue fever in Hawaii has prompted officials to declare a state of emergency on Hawaii's Big Island. Like Zika virus, dengue fever is spread to people through mosquito bites. The Centers for Disease Control and Prevention says dengue fever is a leading cause of illness and death in the tropics and subtropics, with as many as 400 million people infected yearly. Mayo Clinic infectious diseases specialist Dr. Pritish Tosh helps us understand this viral disease.

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