vaccine

A local health worker administers a vaccine at a local health center at the financial district of Makati, east of Manila, Philippines, Friday, Sept. 12, 2014. The World Health Organization and the British government are working with the Philippine Department of Health, UNICEF and a host of other partners to help deliver a month-long campaign to immunize children against Measles, Rubella, commonly known as German measles, and Polio which aims to immunize 13 million children nationwide. (AP Photo/Bullit Marquez)

Bullit Marquez/AP

A local health worker administers a vaccine at a local health centre at the financial district of Makati, Manila

A health worker gives polio vaccine drops to a boy in an outskirt of the Yemeni capital Sanaa

Khaled Abdullah/Reuters

A health worker gives polio vaccine drops to a boy on the outskirts of Sanaa, the Yemeni capital, on Monday.

An Afghan health worker (2R) administers a polio vaccination to a child on the first day of a vaccination campaign in Herat. A new three-day nationwide immunisation campaign against polio began supported by Afghanistan's Ministry of Public Health country wide, officials said.

Aref Karimi/AFP

A health worker administers a polio vaccination to a child in Herat, Afghanistan, at the start of a three-day nationwide immunisation campaign against polio, supported by the country’s Ministry of Public Health

A Pakistani boy suffering from Measles lies asleep after getting vaccinated at a medical camp in Peshawar, Pakistan, 26 April 2013. Pakistani health authorities were scrambling to vaccinate thousands of children across the country after a measles outbreak. Measles was suspected to be the main cause for dozens of deaths last year in Sindh, Punjab, Balochistan and Khyber Pakhtunkhwa provinces, with most children dying because of post-measles complications, including pneumonia and diarrhea, according to media report.

Arshad Arbab/EPA

A Pakistani boy suffering from Measles lies asleep after getting vaccinated at a medical camp in Peshawar, Pakistan, on Friday. Pakistani health authorities were scrambling to vaccinate thousands of children across the country after a measles outbreak. Measles was suspected to be the main cause for dozens of deaths last year in Sindh. 

Pakistani health worker Salma Saleem, right, marks the finger of a child after giving him a polio vaccine

Muhammed Muheisen/AP Photo

Pakistani health worker Salma Saleem, right, marks the finger of a child after giving him a polio vaccine in a neighborhood in Islamabad, Pakistan on April 15 2013. In December, gunmen killed nine polio workers in different parts of Pakistan. Several more workers have been killed since then, as well as policemen who were protecting them. The UN said last month that some 240,000 children missed vaccinations since July in parts of Pakistan’s tribal region, the main sanctuary for Islamic militants, because of security concerns.