The relationship between growth rate and serial interval
Some authors argue that, R0 = int(k(x), x=0..infinity) where k(x) is a reproduction kernel. The normalized quantity f(x)=k(x)/R0 satisfies int(f(x), x=0..infinity)=1. f(x) is pdf of the serial interval. This needs proof. In the compartment model setting: SIR for example, the claim is false.