A suspected outbreak of the rare hantavirus infection on a cruise ship in the Atlantic Ocean has killed three people, according to the World Health Organization and the South African health ministry South Africa's National Institute for Communicable Diseases said it was conducting contact tracing in the Johannesburg region to identify if others were exposed to the infected passengers in South Africa.According to the United States Centers for Disease Control and Prevention (CDC), hantaviruses are a family of viruses that can cause serious illness and death