A. Hand washing only (just a guess )
It is cheaper than anything else. But that nuclear plant could explode etc. what I'm trying to say with the last part is that there is Good and Bad. I hope this helped.
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without choices to choose from, I'd say vaccinations....also herd immunity, and early health screenings.
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Factors which body temperature depends on
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Age.
Sex.
Time of The Day.
Exercise or Physical Exertion.
Stress.
Meals.
Drugs and Smoking.
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Not sure about the example.
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Sensitive factors impacting one's body temperature
- Allergy, blood pressure, and decongestant medications