Small children have far lower levels of vital energy.
Children have much faster metabolisms than adults.
As a result of metabolic rate, the heart rate and breathing of a child is far quicker.
Small babies have less illnesses which come and go far quicker.
Washing hands thoroughly after using the lavatory
Keeping all kitchen worktops clean
Defrosting and cooking all foods thoroughly
Observing buy-by dates
Worming pets regularly
Keeping pets away from family dishes
Observing a healthy diet - no fat, low salt, low sugar
A fifth of the adult dose
A quarter of the adult dose
A third of the adult dose
A half of the adult dose
Three quarters of the adult dose
Full adult doses
Here's an interesting quiz for you.