Linda,
Health is just an excuse, even ADA is older she will still get sick more offen in school, is a way to fight with virus and grow stronger.
The earlier they get immune virus the better. And for Childcare is at least 1-2 times per month to get sick for the first 6mths, after which it will be lesser can be 1 once a month or 1 every two to 3 mths.
Tell you my story, I actually regretted not sending charlotte to childcare earlier, By age of two Charlotte still does not speak and refuse to greet anyone even mummy or daddy. Still need to wear her shoes for her, feed her, refuse to walk only want to be carry or seat in stroller.
She was taken care by grandma, and grandma loves to carry her instead of leting her walk by herself, She refuse to eat even grandma got to force her mouth to open to make her eat. Still wearing diaper, eating pacifier at the age of 2 going to 3 yrs.
Imagine same month and age of her friend they are able to sing, talk, walk, run, climb by themselve. And Charlotte still depending on us.
When just started school this yr, She start to learn to take off her own shoes. When i told her mummy help you? She say No! I wear myself. After 1 or 2 mths of schooling she is off Pacifier, 3-4mths in school her form teacher start to train her off diaper. and within 3 months she tell me that she want to walk, instead of being carried. With in 6 mths she is now a talkative full of nonsenses Girl. She learn to communicate with me and able to communicate with her grandparents in chinese.
Which i had regretted that i had not send her to school earlier otherwise she is even more active now.