public decimal CalculateNumberOfInfectiousIndividuals(DiseaseStateDto diseaseStateDto)
{
var numberOfExposedPeopleOverAverageLatency =
diseaseStateDto.NumberOfLatentIndividuals / diseaseStateDto.MeanLatentPeriodInDays;
var numberOfInfectedPeopleOverAverageInfectiousPeriod =
diseaseStateDto.NumberOfInfectiousIndividuals / diseaseStateDto.MeanInfectiousPeriodInDays;
return(decimal.Round(numberOfExposedPeopleOverAverageLatency - numberOfInfectedPeopleOverAverageInfectiousPeriod, 2, MidpointRounding.AwayFromZero));
}
public decimal CalculateNumberOfSusceptibleIndividuals(DiseaseStateDto diseaseStateDto)
{
var susceptiblePortionOfPopulation =
diseaseStateDto.NumberOfSusceptibleIndivudals / diseaseStateDto.TotalPopulation;
var averagePeopleInfectedPerInfectiousPerson =
diseaseStateDto.BasicReproductiveNumber / diseaseStateDto.MeanInfectiousPeriodInDays;
var rateOfChangeInSusceptibleCount = -susceptiblePortionOfPopulation *
(averagePeopleInfectedPerInfectiousPerson *
diseaseStateDto.NumberOfInfectiousIndividuals +
diseaseStateDto.ForceOfBaselineInfection);
return(decimal.Round(rateOfChangeInSusceptibleCount, 2, MidpointRounding.AwayFromZero));
}
public void CalculateNumberOfExposedIndividuals_ReturnsExpectedCount()
{
var diseaseStateDto = new DiseaseStateDto
{
TotalPopulation = 1000,
BasicReproductiveNumber = 2.68M,
ForceOfBaselineInfection = 10,
MeanInfectiousPeriodInDays = 10,
MeanLatentPeriodInDays = 4,
NumberOfInfectiousIndividuals = 0,
NumberOfLatentIndividuals = 0,
NumberOfSusceptibleIndivudals = 990
};
var exposedCalculator = new ExposedCalculator();
var expectedExposed = 9.9M;
var actualExposed = exposedCalculator.CalculateNumberOfExposedIndividuals(diseaseStateDto);
Assert.AreEqual(expectedExposed, actualExposed);
}
