Table 2.

Estimates calculated using the simple epidemiological approach and model-based approach for reinfection rate, duration of acute reinfection and reinfection clearance probability for the Networks 2 study. Simple epidemiological parameter estimates for reinfection rate and reinfection clearance probability are reported as mean (95% confidence interval); these are calculated based on the assumption that all reinfection events are independent and for consistency with model estimates do not account for within-person correlations. Estimates of reinfection clearance probability are calculated excluding events where there was no subsequent follow-up. Simple epidemiological estimates for duration of acute reinfection are reported as median (interquartile range). All model estimates are reported as median (95% CrI). PY, person-years.

	confirmed reinfections only	confirmed and possible reinfections
data characteristics
reinfection cases (n)	9	26
PY at risk of reinfection	31	106
clearance episodes (n)	4	13
simple epidemiological parameter estimates
reinfection rate (cases per 100 PY)	28.8 (15.0–55.4)	24.6 (16.8–36.1)
reinfection clearance probability	0.50 (0.16–0.84)	0.59 (0.36–0.79)
duration of acute reinfection (months)	3.5 (2.5–11.2)	4.1 (3.0–7.7)
Bayesian model parameter estimates
reinfection rate (cases per 100 PY)	104.1 (21.1–344.1)	61.7 (25.0–231.3)
reinfection clearance probability	0.84 (0.59–0.98)	0.90 (0.80–0.98)
duration of acute reinfection (months)	1.3 (0.3–4.1)	2.5 (0.3–5.2)