del$dx referenced but not set

[mariagq922]

In mod_infection.R, infect_covid_corporate() and infect_covid_contacttrace() reference del$dx but that variable is never set (it does not exist).

# Case isolation with diagnosed or symptomatic infection
        if (at >= act.rate.dx.inter.time) {
          del$actRate[del$dx == 2] <- del$actRate[del$dx == 2] *
                                      act.rate.dx.inter.rr
        }