AIDS survival probability curve

## Usage

`aids_survival(n = 365 * 5)`

## Arguments

- n
Number of days to calculate.

## Value

A vector where the ith element is the probability that an
individual infected with HIV i days ago has not progressed to AIDS.

## References

Ron Brookmeyer and James J Goedert. Censoring in an epidemic with an appli-cation to hemophilia-associated aids.Biometrics, pages 325–335, 1989.