1. As with other live-virus vaccines , immunity initiated by OPV is probably lifelong. 2. After medical internship at measles virus vaccine now used throughout the world. 3. There are currently no plans to include killed-virus vaccines in the national stockpile. 4. Influenza virus vaccines have beneficial implications to an individual s health. 5. A live-virus vaccine , developed by Albert Sabin, was licensed in 1963. 6. The live virus vaccine promised lifetime immunity, while the original Salk vaccine did not. 7. Dr . Sabin's live-virus vaccine was declared safe in 1961. 8. To make a killed-virus vaccine , technicians start by growing, purifying and concentrating the virus. 9. The immunity afforded by this killed-virus vaccine is short-lived and the virus keeps changing. 10. The smallpox vaccine is a " live virus vaccine ."
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