Which of the following vaccines is a live attenuated vaccine?

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Prepare for the NBME Microbiology Test. Study with flashcards and multiple-choice questions. Each query comes with hints and detailed explanations. Ace your exam!

Multiple Choice

Which of the following vaccines is a live attenuated vaccine?

Explanation:
Live attenuated vaccines use weakened forms of the pathogen that can still replicate in the body, provoking a strong and long-lasting immune response that mimics natural infection. The vaccines MMR, Varicella, and Rotavirus are all live attenuated vaccines, since they contain weakened viruses that replicate to stimulate immunity. In contrast, the poliovirus vaccine listed is inactivated, the hepatitis B vaccine is a recombinant protein subunit, and the pneumococcal vaccines are polysaccharide-based (conjugate or plain) rather than live organisms. Therefore, the live attenuated group is the correct choice.

Live attenuated vaccines use weakened forms of the pathogen that can still replicate in the body, provoking a strong and long-lasting immune response that mimics natural infection.

The vaccines MMR, Varicella, and Rotavirus are all live attenuated vaccines, since they contain weakened viruses that replicate to stimulate immunity. In contrast, the poliovirus vaccine listed is inactivated, the hepatitis B vaccine is a recombinant protein subunit, and the pneumococcal vaccines are polysaccharide-based (conjugate or plain) rather than live organisms. Therefore, the live attenuated group is the correct choice.

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