This photo taken in Paris on May 11, 2026 shows vials bearing the name of "hantivirus". A deadly hantavirus outbreak on a cruise ship has spurred global concern over the potential spread of the virus among and from ship evacuees as they head back to their home countries. Here are the World Health Organization`s main recommendations to limit the transmission risks and to better protect those exposed to the rare virus, which usually spreads among rodents, and for which there is no vaccine or treatment. (Photo by Joel Saget / AFP)