Which vaccines are live vaccines?

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Multiple Choice

Which vaccines are live vaccines?

Explanation:
Live vaccines use a weakened form of the virus or bacteria that can still replicate in the body, which often triggers a strong and lasting immune response with fewer doses. MMR and Varicella are both live attenuated vaccines, so they fit this category. The other options are not live vaccines: DTaP and Hib are inactivated or toxoid/conjugate vaccines; Hepatitis A is an inactivated vaccine; Pneumococcal polysaccharide is a non-live polysaccharide/subunit vaccine.

Live vaccines use a weakened form of the virus or bacteria that can still replicate in the body, which often triggers a strong and lasting immune response with fewer doses. MMR and Varicella are both live attenuated vaccines, so they fit this category. The other options are not live vaccines: DTaP and Hib are inactivated or toxoid/conjugate vaccines; Hepatitis A is an inactivated vaccine; Pneumococcal polysaccharide is a non-live polysaccharide/subunit vaccine.

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