1. What is dengue?

Dengue is a disease caused by any one of four closely related dengue viruses
(DENV 1, DENV 2, DENV 3, DENV 4). The viruses are transmitted to humans by the
bite of an infected mosquito. The Aedes aegypti mosquito is the most important
transmitter or vector of dengue viruses, although a 2001 outbreak in Hawaii was
transmitted by Aedes albopictus. It is estimated that there are over 100 million cases
of Dengue worldwide each year.

2. What is influenza?

Influenza is a virus which causes cough or sore throat accompanied by a fever. This
virus is spread from person-to-person through saliva and mucus droplets often formed
when coughing or sneezing. These droplets can also contaminate surfaces frequently
touched, such as doorknobs, doors, and countertops. Sharing items like mobile and
laptops can also spread the virus.

3. How does influenza spread?

Flu viruses are spread mainly from person to person through coughing, sneezing or
talking by people with influenza. Sometimes people may become infected by touching
something – such as a surface or object – with flu viruses on it and then touching their
mouth or nose.