This idea came to my mind too. However, according to the calculations I made, the house does not win this time. This is not a gamble since the numbers are not random.
So you mean that you can really predict how many people would be affected? Well I think you are right you can use statistics in order to predict the number of cases from the certain country
however I don't think their concept is good to be played about or to placed bet on.Ofcourse.
It's more like people betting on whether an economy will crash or not. The desperate ones could go ahead and crash an economy(or provoke a crash) to win their bet. If you crash the economy, many people will suffer. So this is clearly immoral if bettors gain from people suffering/misfortunes.