By JACOB BUNGE and BETSY MCKAY
Wall Street Journal – Jan. 5, 2017
Health workers have a thinning arsenal of insecticides capable of killing mosquitoes that carry Zika and similar viruses as the Southern Hemisphere’s summer begins and as outbreaks persist in other areas.
One reason: Eliminating disease-carrying mosquitoes is a niche business with costly barriers to entry.
“We may be hitting a dead end,”…