Have the children received polio drops?
But wherever they go polio workers must still counter the damaging, and widely believed, rumours about the polio drops.
Normally, polio drops are given only to small children, but many teenagers and adults in central Africa are unprotected.
One injection stops smallpox, but in countries with open sewers, children need polio drops up to 10 times.
In Mogadishu in July, President Hassan Sheik Mohamud publicly took polio drops at an event encouraging parents to vaccinate.
Each weekend for three months up to 8,000 vaccinators are attempting to give oral polio drops to almost every child aged under five in the city.
The ruse may have fuelled fears, backed by religious extremists, that polio drops are a western conspiracy to sterilise the population.
Is there another country in the world where women and men who administer polio drops are hunted down like serial killers?
The revelation regarding Afridi aggravated prejudice against polio drops, with many believing that they are a western conspiracy to sterilise Muslims.
There are 38 new mother and baby health camps in Karachi where polio drops are given in conjunction with other medical help.
They also form the main ethnic group in the Pakistani Taliban.The extremists spread the rumour that polio drops are a Western conspiracy to sterilise Muslims.
