Hantavirus is incredibly deadly.
One of the only reasons that we don't have an issue with it, is we've never seen any outbreaks manage to evolve human-to-human transmission before.
It's always been rodent-to-human contact.
If we have H2H in Hantavirus that ship needs to be stranded at sea until every, single, person is cleared.
Because that would make the previous pandemic look like childs play.
The third world isn't a place, it's a people.
Third world countries exist because they are full of third world people.
If you send every German to Nigeria and every Nigerian to Germany, in 5 years, Nigeria will become a civilized nation and Germany will become a third world.