Forbes contributors publish independent expert analyses and insights. I write about the brain and the body but sometimes other things. New videos show how the N95 masks with an exhalation valve ...

An exhalation delivery system that uses a patient's own breath to carry the anti-inflammatory compound fluticasone (EDS-FLU) directly to the sinuses reduced chronic sinus infection (sinusitis) ...

Using high-speed video and schlieren imaging, a research engineer has created videos that show how air flows through masks with and without exhalation valves. Many people wear masks in public to slow ...

Please provide your email address to receive an email when new articles are posted on . Acute disease exacerbations fell to 66% with treatment — a 56% reduction — compared with placebo. Congestion, ...

Nitric oxide (NO) in exhaled air is believed to reflect allergic inflammation in the airways. Measured levels of exhaled NO vary with the exhaled flow rate, which therefore must be standardized. The ...