But how much?

More Mothers Breast-Feed, in First Months at Least. This hits a pet peeve of mine:

Studies have shown that children who are fed formula have increased risks of ear and respiratory infections, obesity, diabetes and even cancer.

How much of an increase? From what baseline? Did it go from, say, a 2% risk to a 2.1% risk? 0.007% to 0.07%? 0.001% to 50%? The breast is best, but it's not always possible or practical. You cannot make good decisions without knowing the degree of risk you're inflicting on your child. Maybe it's worth it, maybe it isn't. You have no way of knowing from that article.