I still think it's easier for a small baby to get sick in a daycare centre than in a private home. I didn't send my first one to a daycare until he was about 2 and half and I plan to do the same to my second one. Also, by sending him to a daycare centre almost means the same as your giving up his chinese.
For my second one, I stayed at home for a year and begged my mom to come here to take care of him for a half year, and now he's 1 and half and I think he is ready to go out of home. After some hesitation, (I have a neighbour who's babysitting my first one after school offered to take care of my second one as well, the only downside is she's English speaking),I still chose to find a Chinese lady to look after my little one.
And I have my reasons to dislike daycare centres. First of all, there're so many kids, it's good for bigger ones to play and communicate with each other, but for infants, do they need to? I guess not much. For baby before 2 and half, teacher/kids ratio is 1:5 (correct me if I am wrong), and after I think is 1:8. Rarly a home-based care giver would carry that many kids, except those so-called "REGISTERED home daycare".
Secondly, Still too many kids, some parents are well aware of keeping sick kids at home, some just don't bother until the teacher formally inform them that they'd better do so. Usually there're about two-four techers in a classroom, meaning that you have 10-20 infants or 20-30 toddlers in one room, if one or two get sick, don't need to imagine what will come next. I've seen not once that almost the whole class got running noses.
I admit the regular programs running in a daycare centre is much better and the teachers are well trained for it, but all these are good for toddlers, preschoolers, not infants.
There's a daycare centre close to our home, I've been there once to look for a space for my big one when we just moved closeby. Everthing looked terrific, the teachers are nice, big play room, all sorts of program. But last year, since I was home with my second one, I have many chances to pass by the daycare centre's play ground and sometime, they came out to the park beside my house, so we sort of playing in the same play ground. I saw so many unpleasant things, ok, maybe not too many, but even once I'll not feel comfortable. One example: a girl, around 1 and half, was sitting on a bench in their play ground, crying for mom, two teachers were standing about 5 metres away, having a conversation with each other. I stood outside with my baby for couple of mins, nobody came close to the crying girl. Ok, the girl got attention at last, I almost wanted to alert them that somebody's crying, but I was guessing whether that's one of their strategy to train babies.
Maybe I criticised too much, really, you can't ask somebody else to love your baby the same way you do. But I have the feeling that usually Chinese are better, at least the couple of care-givers I ever had are really good, sometime even too good, I have to tell them to take it easy.
I guess I wrote too much here, maybe nobody will bother to read to the end.
So I'll just briefly speak out my preference here: if possible, stay as long as you can with the baby (better till 2yr), otherwise, find a chinese person at least till he could well speak chinese, then send him to a daycare centre (I say for him to suffer, so he would know what a home is, how good parents are)