The Taliban have shot and killed eight United Nations aid workers in northern Pakistan this week. A number of others have been injured. These mainly female workers were part of a UN immunisation programme - giving children shots against polio.
Poliomyelitis (to give it its full name) has been entirely eradicated from the West and only remains in Pakistan, Afghanistan and Nigeria. It attacks the nervous system and can be fatal. Those who recover are often left with lifelong disability.
However, according to the Taliban, vaccination is un-Islamic!