CHICAGO, March 15 (Reuters) – An experimental pill for dengue developed by Johnson & Johnson (JNJ.N) proved effective against all four types of the virus in mice and prevented infection from two types in monkeys, according to data published on Wednesday.

The promising early animal results appearing in the journal Nature add hope for what could become the first antiviral treatment for a mosquito-borne disease that causes 96 million symptomatic infections and 10,000 deaths each year.