- Cannabis use and risks of respiratory and all-cause morbidity and mortality: a population-based, data-linkage, cohort study https://bmjopenrespres.bmj.com/content/9/1/e001216 186 comments science
- As alternative to surgical masks, scientists recommend a cloth mask made of at least 3 layers (300–350 threads/inch) with a nylon stocking layer over mask for better fit. Water-resistant polyesters/ nylon, blends & water-absorbing cotton, should be in outside, middle, & inside layers, respectively. https://bmjopenrespres.bmj.com/content/7/1/e000698.full 3 comments science