Researchers in Gorgas Commemorative Institute of Health Studies (ICGES), responsible for diagnostic Zika cases in Panama, make tests at a laboratory of the institute, in Panama City, capital of Panama, on Feb. 3, 2016. The director in charging of Epidemiology of the Department of Health of Panama, IsraelCerdeno, said Tuesday that the number of Zika virus cases in Panama increased to 50, mainly in the indigenous region of Guna Yala, according to local press information. (Xinhua/Mauricio Valenzuela)