Complement is a blood test that measures the activity of certain proteins in the liquid portion of your blood. The complement system is a group of nearly 60 proteins that are in blood plasma or on the surface of some cells.
The answer is all of the above
It would be varies to the AGE of the children cared for
Basically, more staffs will be assigned to supervise the children in the active age groups.
For example :
The ratio would be about 1 : 10 for 1 year old infants and it will be 1:5 to the groups over than 5 years old
