In this Monday, April 23, 2013 photo a nurse administers a combined vaccine against diphtheria, whopping cough and tetanus vaccine to 2-year-old Roman Pschenichny while his mother Inna holds him at ... more 
In this Monday, April 23, 2013 photo a nurse administers a combined vaccine against diphtheria, whopping cough and tetanus vaccine to 2-year-old Roman Pschenichny while his mother Inna holds him at Children's Hospital No. 1 in Kiev,Ukraine. Only about one-half of Ukraine’s children are fully immunized against vaccine-preventable communicable diseases in line with local health regulations, compared to over 90 percent in Western Europe, according to UNICEF, the United Nations children’s agency. Such a low immunization rate has already led to a major outbreak of measles and a risk of an outbreak of polio, a highly dangerous disease which may cause paralysis and which has been unseen in Ukraine for more than a decade, UNICEF and the World Health Organization said ahead of the current World Immunization week. (AP Photo/Sergei Chuzavkov) less 
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Associated Press | Photo By Sergei Chuzavkov
Tue, Jun 18, 2013 2:23 AM EDT