India, May 24 -- The recent Ebola and hantavirus outbreaks demonstrate that the world is still vulnerable to rapidly spreading infectious diseases, Tedros Ghebreyesus, the head of the World Health Organization (WHO), warned on Saturday at the close of the 79th World Health Assembly in Geneva.

His call came as Ugandan authorities confirmed on Saturday that there were three new cases of the Bundibugyo strain of the Ebola virus, which to date has neither a cure nor a vaccine.

"The three new cases include a Ugandan health worker, a driver and a Congolese national who travelled from Ituri Province in the neighbouring Democratic Republic of the Congo, (DRC), for medical care," Tedros said in a social media post. "This brings the total number ...