<em>Vaccines work by simulating an illness to help establish immunity. However, while this sort of infection nearly never produces sickness, it does trigger the immune system to create T-lymphocytes and antibodies. The imitation illness can sometimes induce modest symptoms, like as fever, after receiving a vaccination.</em>
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<em>- RobertOnBrainly</em>
Answer:
C
Explanation:
It makes sense why it would be called cross training
Also use process of elimination
Answer:
false food does not spoil as quick
Explanation:
D. He has increased his knowledge to find out more on how to reduce high blood pressure. Hope this helps :)