In asthma, the tightening of muscles around the bronchi causes damage to the airway by squeezing and destroying epithelial cells, which promotes the airway inflammation and mucus production often associated with an asthma attack, researchers report.
Why Are So Many Americans Dying of COVID? ‘Gas-Station Heroin;’ Measles Outbreak
Note that some links may require registration or subscription. About 1,500 Americans are dying of COVID-19 every week. Why? (ABC News) The FDA is temporarily