Not all bad news by any means: because if the U.S. uses their resources well enough, the number of people affected could be less that 10% of the population, roughly the same number who get affected during the normal flu season. By continuing to administer vaccines as they were developed, around 0.7% would be infected. For the worse case studied, that would still limit it to 2.8% of the population.

My favorite comment on the article, from someone who takes "computer simulations" with a grain of salt:

the headline of 151 million isn't scary it's inflammatory special pleading bullshit. I could run a computer simulation that would forecast that I was going to marry Charlize Theron, but it wouldn't mean that it was going to happen