What to know about hantavirus​What to know about hantavirus 

 The virus that is believed to be responsible for the deaths of three people and the illnesses of three others aboard a cruise ship over the weekend is a relatively rare but devastating threat without a vaccine, treatment or cure.  ​​The virus that is believed to be responsible for the deaths of three people and the illnesses of three others aboard a cruise ship over the weekend is a relatively rare but devastating threat without a vaccine, treatment or cure.