First dengue vaccine cleared for use

Mexican health authorities have approved the first vaccine to gain official acceptance for use against the dengue virus, which infects an estimated 390 million people every year, mostly in Asia, Africa and Latin America.
The federal medical safety agency said on Wednesday that the vaccine has undergone testing on over 29,000 patients worldwide.
The deadliest form of the mosquito-borne disease kills 22,000 people per year, according to the World Health Organisation.
It also affects more than 400 million people a year across the world, mainly urban areas in tropical and sub-tropical climates.
French pharmaceutical company Sanofi said it developed the vaccine, Dengvaxia, over the past 20 years.
Some 40,000 people will receive the treatment in Mexico in an initial phase.