A single measles outbreak cost one U.S. county $3.4 million, a new government study estimates, underscoring the societal burden of inadequate vaccination rates. The outbreak occurred in Clark County, Wash., in early 2019, and ultimately infected 71 people — mostly children younger than 10 who hadn’t received the measles-mumps-rubella (MMR) vaccine. The county’s low MMR…  read on >  read on >

Cotton masks provide better protection against the new coronavirus than those made with synthetic fabrics, researchers say. In a new study, investigators tested different mask fabrics under conditions that mimic the humidity of a person’s breath in order to assess how the fabrics perform in actual use. Under humid conditions, filtration efficiency (a measure of…  read on >  read on >

In medieval Europe, when childbirth was highly perilous for both mother and child, women and those caring for them used various talismans to try to influence a safe delivery. Not many of those relics have survived, but scientists have been studying one – a parchment “birthing girdle” – using non-invasive sampling and protein analysis. “Although…  read on >  read on >

Yes, you really are seeing double — more twins are being born now than ever before. There are a number of reasons why, according to a new study. Since the 1980s, twin births rose by a third worldwide — from 9 to 12 per 1,000 deliveries. About 1.6 million twins are born each year and…  read on >  read on >

Social distancing during the COVID-19 pandemic appears to have prevented an anticipated outbreak of a rare polio-like syndrome in children, researchers report. Acute flaccid myelitis (AFM) is a spinal condition that causes weakness in the limbs, impairs motor function and can lead to lifelong disabilities. It was first reported in the United States in 2012,…  read on >  read on >

If you’re drinking more, sleeping less, seeing downright scary numbers on your scale and fretting about the future, you’re far from alone, a new survey reveals. “We’ve been concerned throughout this pandemic about the level of prolonged stress, exacerbated by the grief, trauma and isolation that Americans are experiencing,” said Arthur Evans Jr., chief executive…  read on >  read on >

Tetrahydrocannabinol (THC), the psychoactive ingredient in marijuana, remains in breast milk for up to six weeks and may be harmful to infants, a new study warns. The researchers said the finding supports recommendations from the American Academy of Pediatrics and others that women shouldn’t use marijuana while pregnant or breastfeeding. “Just as we now caution…  read on >  read on >