"Nonsymptomatic people or people just mild flu symptoms will go on in the US infecting others." I believe this is part of why it spreads so swiftly. Even when

"Nonsymptomatic people or people just mild flu symptoms will go on in the US infecting others." I believe this is part of why it spreads so swiftly. Even when people get the symptoms under control, some of them seem to continue on as symptom-free carriers for a while afterward. Being symptom-free doesn't equal being bug free. I imagine it gives people a false sense of health, with an immediate impact on those around them.