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| | Weakened or thinned. Attenuated strains of disease-causing bacteria and viruses are often used as vaccines. The weakened strains are used as vaccines because they stimulate a protective immune response while causing no disease or only mild disease in the person receiving the vaccine. |
| Previous Definitions: | atorvastatin calcium, ATP, ATRA, atrasentan, ATT/RHT | | Next Definitions: | atypical hyperplasia, atypical teratoid/rhabdoid tumor, Augmentin, augmerosen, auricular |
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