Vaccination teams from around the globe have been placed in jeopardy or lost their lives, through suspicion and ignorance mostly.
In some instances, it might be because some community/militia group leaders suspect that the vaccination programme is a cover for intelligence gathering, in other instances, such as in Northern Nigeria, it is because some of the community leaders have preached that such programmes are a western conspiracy and that the vaccinations will cause/contain HIV, or will cause infertility.
The death toll amongst vaccination workers in these areas- and sadly, many are in muslim areas- is high.
Just 1 year ago, 8 female vaccinators were shot dead in Northern Nigeria, the shooting thought to be the work of the islamic militant group and al-quaeda affilitiate, Boko Haram.
http://www.bbc.co.uk/news/world-africa-21381773