1.   It accounted for a third of all oral polio vaccine administered.

2.   Attenuated virus vaccines, like the Sabin oral polio vaccine, are similar to the disease-causing versions except that they have lost the genetic capacity for virulence.

3.   Hooper suggested that the contamination might have come from an experimental oral polio vaccine prepared at the Wistar institute, a research center in Philadelphia.

4.   Like oral polio vaccines, the nose-spray flu vaccine is made of live but weakened flu viruses, Piedra said.

5.   Oral polio vaccine continues to be recommended as the most effective prevention in parts of the world where polio remains endemic.

6.   Parents of two children infected with the disease as a result of oral polio vaccine were among those who made comments at a public hearing on Wednesday.

7.   The oral polio vaccine, also made from a live but weakened strain of the polio virus, has practically eliminated that paralyzing disease.

8.   Oral polio vaccine, or OPV, is the only drug that causes immunity in the intestine, where polio grows before it causes paralysis.

9.   A U.S. federal advisory panel Thursday recommended replacing the oral polio vaccine with the injected version to reduce the chance of contracting the paralyzing disease.

10.   Armed with batches of oral polio vaccine and bottles of liquid Vitamin A, the workers headed into the field Tuesday.