Function for efficacy against infection

$$1 - \left( \frac{1}{1 + e^{-k \cdot \log_{10}(NAT) - \log_{10}(ab_{50})}} \right) $$

Usage

ve_infection_functional_form(NAT, k, ab_50)

Arguments

NAT

neutralizing antibody titre on a linear scale

k

half maximum parameter

ab_50

scaling parameter