New $2 saliva test to detect Zika in 40 minutes
US-based researchers have designed a portable $2 saliva test which they claim​ can diagnose Zika in 40 minutes. To make the test highly-selective, researchers identified a stretch of genetic code that is nearly identical for 19 different Zika strains. The system, which only requires the addition of water, contains a dye that turns blue in the presence of Zika virus.