Generally speaking, vaccinations are effective in combating future infections because they induce the production of

A. mutations in the host genome.
B. prostaglandins.
C. helper T cells.
D. neutrophils.
E. memory cells.


Answer: E

Biology & Microbiology

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When a gamete that is lacking a sex chromosome due to nondisjunction has fused with a gamete carrying an X chromosome, this type of abnormality leads to ________.

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