This is the part of the Hantavirus saga worth watching the most: 1) Normally the Andes Hantavirus takes long-term significant exposure to infect someone. It infecting a flight attendant after a flight, is not impossible, but it is surprising. 2) Normally it has a longer incubation period. The flight attendant already having symptoms is also incredibly uncommon. These are the two traits that suggest some possibility of a mutation. The rest of the infections are dismissible data points because of the amount of time people spent together on that ship. This one is the first one that's a yellow flag. Planes are small, and she did interact with the patient, but infection should have been low odds.(Adam Cochran (adamscochran.eth))