Which statement about Dengue is true?

Which statement about Dengue is true?

• A. Transmitted by ticks only
• B. A vaccine exists
• C. Local transmission by Aedes albopictus detected in Hawaii (2001-2002)
• D. It is not present in the Americas

Answer: (C)

Dengue is transmitted by mosquitoes, not by ticks, and can be spread locally by certain Aedes species. The statement about local transmission in Hawaii during 2001–2002 is true because that outbreak demonstrated dengue spreading within a community, with Aedes albopictus implicated as a vector in that setting. This shows that dengue is not confined to one mosquito species or to imported cases; when the right conditions exist—enough susceptible people, suitable climate, and mosquitoes present—local transmission can occur, and Aedes albopictus is a competent vector in many regions. The other points don’t fit as well. Dengue is not transmitted by ticks, so that option is inaccurate. A vaccine does exist in some contexts, but for practical public health use at the time these materials were written, dengue vaccines were not widely deployed or considered a routine protective measure, so that statement isn’t the best choice. And dengue is present in the Americas with repeated outbreaks across many countries, so declaring that it is not present there is false.

Dengue is transmitted by mosquitoes, not by ticks, and can be spread locally by certain Aedes species. The statement about local transmission in Hawaii during 2001–2002 is true because that outbreak demonstrated dengue spreading within a community, with Aedes albopictus implicated as a vector in that setting. This shows that dengue is not confined to one mosquito species or to imported cases; when the right conditions exist—enough susceptible people, suitable climate, and mosquitoes present—local transmission can occur, and Aedes albopictus is a competent vector in many regions.

The other points don’t fit as well. Dengue is not transmitted by ticks, so that option is inaccurate. A vaccine does exist in some contexts, but for practical public health use at the time these materials were written, dengue vaccines were not widely deployed or considered a routine protective measure, so that statement isn’t the best choice. And dengue is present in the Americas with repeated outbreaks across many countries, so declaring that it is not present there is false.