The author addresses that: > This model assumes that the question’s hypothetical is correct and the fatality rate is 1%. It also assumes for the sake of argume

The author addresses that: > This model assumes that the question’s hypothetical is correct and the fatality rate is 1%. It also assumes for the sake of argument 100% infection. (In reality, of course, neither of these is a perfect match to reality. The infection rate will never hit 100%, but the fatality rate in a widespread infection is likely to be greater than 1%, because health care services will be overwhelmed.)