1.   And inspectors worried about other lots that might have contained live virus.

2.   He has since led an unsuccessful campaign to eradicate remaining stocks of the live virus at the CDC and in Russia.

3.   Hultin said he was not worried that he might be sending tissue containing live viruses.

4.   If people given the Sabin vaccine are exposed to polio, the immunity in their gut will stop them from excreting the live virus.

5.   It does not use an altered version of a live virus, and it should also be relatively easy to produce in large quantities.

6.   It is derived from a synthetic protein, not a live virus like the polio vaccine.

7.   Many vaccines are made by weakening a live virus.

8.   Russian health authorities offered Monday to supply the United States with some of its own anthrax vaccine, which is made from live viruses, AP reported.

9.   Shortly after people began using the polio vaccine, a drug manufacturer mistakenly left live virus in a batch, causing several cases of polio.

10.   Shortly after the Salk vaccine came into use, a manufacturing error left live virus in one batch.