Table 1. Laboratory confirmed measles outbreaks detected during October 2011 and April 2012 and sampling details.
| Laboratory confirmed outbreaks detected by the surveillance system during 1 October 2011–30 April 2012 | Laboratory confirmed outbreaks selected for the measles CFR study | ||||||
| District | Number of outbreaks | Number of measles cases reported | Number of village tolas affected | Number of households in the village tolas | Number of outbreaks | Number of village tolas | Number of households |
| Banka | 2 | 82 | 7 | 1049 | 1* | 6 | 927 |
| Darbhanga | 9 | 528 | 31 | 5156 | 5 | 11 | 1505 |
| Khagaria | 1 | 39 | 1 | 539 | 1 | 1 | 544 |
| Madhepura | 1 | 176 | 4 | 278 | 1 | 4 | 280 |
| Madhubani | 2 | 1048 | 49 | 3961 | 1 | 41 | 3210 |
| Purnia | 2 | 112 | 4 | 425 | 1 | 1 | 92 |
| Saharsa | 3 | 149 | 10 | 816 | 2 | 7 | 659 |
| Samastipur | 2 | 96 | 7 | 1522 | 1 | 5 | 909 |
| Sitamarhi | 1 | 56 | 1 | 125 | 1 | 1 | 125 |
| Supaul | 6 | 546 | 21 | 1901 | 3* | 9 | 646 |
| Vaishali | 2 | 88 | 2 | 123 | 1 | 1 | 179 |
| Total | 31 | 2920 | 137 | 15895 | 18 (58.1%) | 87 (63.5%) | 9076 (57.1%) |
*One serum sample from an outbreak in Banka and another sample from an outbreak in Supaul were positive for IgM antibodies against rubella.