Table.

Summary of best-fitting estimates for the risks of developing disease soon after recent (primary) infection, through (endogenous) reactivation or following (exogenous) re-infection among males for an intermediate assumption about the annual risk of infection, namely that it declined from 10·3% in 1950 by 7·5% p.a. until 1967 and by 13·5% p.a. thereafter

^*See Appendix for the equation.

^†Cumulative risk of disease during 5 years after infection or re-infection.

^‡Annual risk of disease.