Ways to deliver medical aid. Which ones are under your control?:
- Oral (ingestion)
- Subcutaneous
- Intramuscular
- Intravenous
- Inhalation (nasal & pulmonary)
- Mechanical waves (auditory / ears)
- Visible light waves (ocular / eyes)
- Magnetic field
- ...
The list goes on, are you able to extend it?