另外，虽然公认母乳喂养的总体效益，但是新生儿的健康可因母乳中污染物的含量高而受到影响。

Additionally, while the overall benefits of breastfeeding are recognized, the health of the newborn may be affected by high levels of contaminants in breast milk.

youdao

应对主要的风险因素(包括营养不良和室内空气污染)与接种疫苗和母乳喂养一样，对预防肺炎是至关重要的。

Addressing the major risk factors - including malnutrition and indoor air pollution - is essential to preventing pneumonia, as are vaccination and breastfeeding.

youdao