Video Duration 01 minutes 49 seconds

Vaccine hunt: How mosquito saliva may stop viruses

Scientists believe they are getting closer to finding a way to prevent the next epidemic.

Nobody knows where the next epidemic will come from.

But scientists in Cambodia are preparing for a clinical trial of a universal vaccine against mosquito-borne viruses.

They believe that the insects’ saliva could be the key to stopping the next health crisis.

Al Jazeera’s Sara Khairat reports.