Answer:
<em>Prejudice</em> is An unfavorable judgment or opinion formed beforehand or without knowledge of the facts about something.
A <em>stereotype</em> is an oversimplified or exaggerated conception or opinion.
<em>Prejudice</em> is judgement and stereotype is a opinion.
they are similar because they are both negative
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So its acquired immunity and the cells responsible are the B lymphocytes that produces antibodies against the virus. Memory is keep since first encounter of the virus by the immune system by way of the antibodies that was initially produced. The antibodies are there already, which makes it fast to act upon when expose again.