Even small increases of nitrogen dioxide (NO2) air pollution may cause an uptick in heart- and lung-related deaths, underscoring the need to tighten limits on this type of air pollution, Chinese researchers say. NO2 is produced by burning fuel for vehicles, power and industrial production. World Health Organization (WHO) air quality guidelines recommend NO2 levels…  read on >  read on >

Women who develop diabetes during pregnancy have a higher risk of complications for themselves and their babies if they’re night owls instead of early birds, a new study finds. Gestational diabetes increases the mother’s risk of premature delivery and preeclampsia (pregnancy-induced high blood pressure). It also raises the baby’s risk of growing too large in…  read on >  read on >

COVID-19 transmission is rare in schools that follow precautions such as mandatory masks, social distancing and frequent hand-washing, a new study finds. And that’s true even among close school contacts of people who test positive for the new coronavirus, according to researchers at Washington University School of Medicine in St. Louis. “Schools can operate safely…  read on >  read on >