Basic reproductive rate
The basic reproductive rate
or the intrinsic rate of reproduction
is the number of secondary infections caused by a single infectious case. This metric is useful because it helps determine whether or not an infectious disease
will spread through a population. If this number is greater than one, on the average, a disease will take off. If this number is less than one, on the average, a disease will eventually fade from a population.
This statistic is often referred to by the name R0. It was originally used by George MacDonald in 1952, who constructed population models of malaria.