Disease Indication Overviews
Learn how infectious diseases are discovered, diagnosed and treated with our indication fact sheets, and read about our partnerships with companies developing and deploying vaccines, treatments and preventive devices worldwide in our overview sheets.
CHIKV outbreaks have occurred in countries in Africa, Asia, Europe, and the Indian and Pacific Oceans. It was found for the first time in the Americas on islands in the Caribbean in 2013 and has spread throughout most of the Americas. It has since been identified in over 60 countries in Asia, Africa, Europe and the Americas. No commercially available vaccine to prevent or medicine to treat CHIKV infection is currently available.
Lassa fever is a type of hemorrhagic fever caused by the Lassa virus and is mainly transmitted by rodents. The virus was first detected in 1969 in the town of Lassa, in Borno State, Nigeria; hence, its name. Lassa is endemic to West Africa, specifically Nigeria, Liberia, Sierra Leone and Guinea. A significant number of individuals infected by the Lassa virus (~80%) do not appear to develop symptoms. The case fatality rate (CFR) has been reported to be upwards of 70%