Table 3. Results from the vaccine effectiveness study in 8 districts, Malawi, 2010*.

Vaccination status	Total	No. cases	Attack rate, %†	Vaccine effectiveness
				Crude, % (95% CI)	Adjusted, % (95% CI)‡
Unvaccinated	793	91	13.3	Referent	Referent
Vaccinated with MCV
1 dose§	2512	62	2.4	82.0 (72.9–88.1)	83.9 (70.8–90.8)
2 doses¶	1777	22	1.1	91.6 (84.7–95.4)	90.5 (79.7–95.5)

*Districts are Blantyre, Mzimba, Lilongwe, Thyolo, Chiradzulu, Mangochi, Balaka, and Machinga. MCV, measles-containing vaccine.
†Weighted and adjusted by the study design.
‡Adjusted by age, sex, and literacy of the caregiver.
§Routine immunization.
¶Routine immunization and 2008 supplementary immunization activities.