It is because adults who have learned about medicines know whats right for you
empathy (noun):
ability to understand and share feelings of another
The first time a pathogen hits, our bodies do not know how to handle it properly. This means that our bodies take more time to handle it the first time around. The second time around, however, our bodies have altered so that they can handle the pathogen more efficiently. Hope this helps!
Sinotrial node or the SA node
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