In pictures: Polio vaccination drive

1 of 9 Senegalese children are being vaccinated against polio, as the second phase of an effort to eradicate the crippling disease kicked off this week in West Africa.

2 of 9 Part of the job of health workers is to convince parents of the benefits of the vaccination; in Nigeria there have been safety fears.

3 of 9 People are often fascinated by the immunisation against the disease which is reaching epidemic proportions in Africa.

4 of 9 One baby being vaccinated however showed little interest.

5 of 9 The work is far from glamorous - vaccination teams have to travel along dirt tracks to get to some villages.

6 of 9 Vaccinations take place in less than salubrious surroundings.

7 of 9 In Niassene, vaccinations took place while dinner was being prepared.

8 of 9 There are teams of vaccinators working across West Africa in what is the biggest ever public health drive against polio.

9 of 9 After a long day, the health workers get together for a well-earned dinner.