Three travelers have died aboard a cruise ship sailing from Argentina to Cape Verde . There is a suspected hantavirus infection. Another traveler has tested positive for the virus. According to media reports, the 69-year-old is receiving intensive care treatment in South Africa . Two crew members have also fallen seriously ill. How and where exactly the travelers were infected remains unclear. "The risk to the general public remains low," the WHO 's European regional office said in a press release Monday. "There is no reason for panic or travel restrictions." The ship involved is the "Hondius," operated by Dutch company Oceanwide Expeditions. There are currently 149 passengers and crew members on board. Zoonoses and the hidden pandemic risk in your backyard To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video What is hantavirus and how does infection occur? Hantavirus is a zoonotic disease , meaning it is transmitted from animals to humans.…