Question

Some vaccine administrations such as the MMR are initiated in children at 12 months of age at the earliest, whereas others like that for Hepatitis B virus are given immediately following birth. From our discussions in class, what is the most likely reason that some vaccines are administered at this later time point? Select one: a. Children only produce lgM up until about 1 year of age b. Mature T helper cells are not released from the thymus until about 1-2 years of age c. Children less than 1 year old cannot produce IgG d. Persistent maternal Ig binds to vaccine antigens and blocks immune activation e. Children cannot make or secrete any antibodies until about 12 months of age

Answer 1

Answer :) Option d

It is advised not to give MMR vaccines before 9 months after the birth. This is because maternal antibodies to MMR can work contrary to the vaccination of the baby and hence blocks the immune activation.

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