Table 3. Age-specific estimates of vaccine effectiveness for 1 and 2 doses of measles, mumps, rubella vaccine.

Age group, y	Effectiveness
	1 dose, % (95% CI*)	2 doses, % (95% CI*)
2	95.9 (81.1–99.1)	–
5–6	93.8 (84.1–97.6)	98.8 (97.0–99.5)
7–8	90.3 (81.2–95.0)	95.8 (92.9–97.5)
9–10	86.5 (75.3–92.6)	92.4 (87.7–95.3)
11–12	65.9 (30.3–83.3)	86.4 (74.1–92.9)

*CI, confidence interval; p for linear trend <0.001 for 1 and 2 doses.