Parameters estimated by fitting models to data on laboratory-confirmed RVGE cases in England and Wales.

*NA = Not applicable.
†An exponential distribution was used to describe increasing probability for reported symptomatic infection with age. With probability p(a) = A*exp(a*B) exposed individuals in “later infection" are moved to exposed group of second infection. The remaining 1-p(a) continues to the “later" infection group. The age a was chosen as the midpoint of the various age groups.