Update NAT for seperate vaccine and infection-derived NAT

Source: R/process_nat.R

Process that updates NAT titre for model where vaccine and infection derived NAT are stored separately. The NAT values are stored on the natural log scale. This process will not calculate decay correctly for dt > 1 so that is disallowed.

independent_ab_titre_process(parameters, variables, dt)

Arguments

parameters

a list of model parameters

variables

a list of model variables

dt

time step size