Well think about it.... Pediatrics for example are most likely afraid or intolerant of different routes for exanple, not tolerating intravenous and being scared of intramuscular or other injection type things. They would probably be more tolerant of something not considered invasive for example subcutaneous or ingestion. A child body size and metabolism would also be quite fast at receiving the effects of such. Geriatrics do not feel as much pain and because of the slowed down metabolism probably would require routes that are much faster and would be more tolerant of more invasive routes. Pregnant women would probably prefer something slow acting or would not be metabolized at such a rate that it be dangerous toward the child.
Bacteria is something else that you would need to know
Back when the Industrial Age was in motion many workers were hurt on the job, but keep working because they didnt get any money if they did not work. This lead to the contamination of products such as meat and other food items. Also children began to work back then as well and when mothers learned that thier children were getting hurt they demanded money to pay for the cost of medical bills.
The primary stress hormone Cortisol increases the blood supply of sugar (glucose), enhances the use of glucose by your brain and increases the availability of tissue - repaired materials.
