Erik De Castro/Reuters
A Filipino transgender woman holds a huge red ribbon symbolising the fight against the HIV virus as she poses before photographers during a World Aids Day celebration in Manila, Philippines today.
Visual artists gather during a rally against the Ebola virus which has been effecting neighboring countries on Thursday, in Abidjan, the capital of the Ivory Coast
An Indian man covers his nose as a municipal worker fumigates the area to prevent mosquitoes from breeding after the number of dengue fever deaths rose in New Delhi. Dengue fever is a potentially serious mosquito-borne virus.