| unit_probability {covidprobability} | R Documentation |
Calculate a time series of unit-wide probability following exposure
Description
To calculate the probability that any asymptomatic person has COVID-19,
this function treats each person/exposure as independent events and
calculates the probability time series using the individuals time series from
individual_probability().
Usage
unit_probability(test_day, pre0, sens, spec, asympt, days, mu, sigma, n)
Arguments
test_day |
Day of PCR test (days since exposure) |
pre0 |
Pre-test probability of person on day of exposure |
sens |
A vector of sensitivities by day since exposure |
spec |
The specificity of the PCR test |
asympt |
The proportion of infected patients expected to remain asymptomatic throughout the course of infection |
days |
Days since exposure for calculation range |
mu |
The mean of a lognormal distribution that approximates the incubation period for COVID-19. E.g. 1.63 (see reference). |
sigma |
The standard deviation of a lognormal distribution that approximates the incubation period for COVID-19. E.g. 0.5 (see reference). |
n |
Number of exposed individuals |
Value
The probability of an event with the specified probability, after n repetitions