title: US officials warn 39 countries about risk of hantavirus among travellers to Yosemite.
authors.forename: Bob
authors.initials: B
authors.lastname: Roehr
mesh_terms: D002140:California / Q000453:epidemiology; D004196:Disease Outbreaks; D018778:Hantavirus Infections / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D014195:Travel