Breast milk isn't always given to infants in busy NICUs, where clinicians often focus on other medical issues and may not take time to arrange for mothers to pump milk.
In one of the first studies to address this issue, Netherlands epidemiologist Robert Laheij culled medical records of 365, 000 patients and found that people taking proton pump inhibitors had a 90% higher risk of getting pneumonia than a control group not taking the drugs.