which of the following pairs of diseases is viral as well as transmitted by mosquitoes?

Yellow fever is a serious disease caused by the yellow fever virus. Most people infected with yellow fever virus do not get sick or have only mild symptoms. Yellow fever virus is transmitted to people primarily through the bite of infected Aedes or Haemagogus species mosquitoes.

Dengue viruses are spread to people through the bite of an infected Aedes species (Ae. aegypti or Ae. albopictus) mosquito.