An outbreak of the rare but highly deadly hantavirus on a cruise ship is causing international alarm, as authorities scramble to trace those who may have been exposed in a bid to curb its spread. The World Health Organization says that to date, there are eight cases of hantavirus infection linked to the MV Hondius , which is currently en route to the Canary Islands . Three passengers who boarded the Hondius have died, one of whom was confirmed infected. Dr. Tedros Adhanom Ghebreyesus, the WHO’s director-general, has said that the overall public health risk from hantavirus remains low, and officials have dismissed the concern of hantavirus becoming a global pandemic threat like COVID-19.  But investigations continue as the situation grows complex. Nearly 150 passengers and crew members from 23 different nationalities are still on board the ship, with several reportedly disembarking before news of the outbreak emerged.…