Well because it is the amount that the nutritional facts are given on, say you buy a box of donuts, and it says 80 calories that could be for a 2 donuts for 1 for the whole package but knowing the serving size you can base how much you eat etc
When penicillin was first developed in 1940, many doctors regarded it as a Panacea that would end all infectious diseases.
Viruses because children immune system cannot repeal parasites (no one can) or bacteria that is why we wash or hands. Fungi is not something we can repeal either.
Answer:
you're body takes a screenshot
Explanation: