The most recent yellow fever massvaccination campaign in this area was conducted in 1987 and as a result the population is highly susceptible to the disease.
该地区最近一次黄热病大规模预防接种运动是在1987年进行的。 因此，这里的人口极易受该病的影响。
2
A massvaccination campaign is being prepared in both countries to protect the population at risk and to prevent the spread of the disease to densely populated urban Settings.
这两个国家都在准备开展大规模预防接种运动以保护危险人口和防止该病向人口密集的城市住区蔓延。
3
On the basis of the outbreak investigation, it was decided to carry out a reactive massvaccination campaign targeting 366,052 people in the health district of Ouahigouya.