Table 1. Incidence rates (IRs) of ILI and sARI cases detected for pregnant women, stratified by trimester stage and for the overall cohort.

Trimester stage	ILI		sARI
	No. of cases	IR per 1,000 person-days (95% CI)	No. of cases	IR per 1,000 person-days (95% CI)
1st	35	29.0 (25.9–32.5)	1	0.9 (0.2–5.2)
2nd	83	11.7 (10.9–12.6)	1	0.1 (0.03–0.8)
3rd	56	8.70 (7.96–9.51)	0	0 (0.0–0.4)
Overall	174	11.8 (11.2–12.4)	2	0.1 (0.04–0.4)