Tanzanian Rats Help in Identifying Tuberculosis – VOA Learning English (Dec 17, 2016)
http://av.voanews.com/Videoroot/Pangeavideo/2016/12/2/2b/2b978b45-debd-4ca7-bd55-8fc4f7e62946.mp4 Tuberculosis (TB) is one of the top 10 causes of death worldwide. It killed about 2,000,000 people last year. […….]