Health Highlights: March 18, 2022

'Zapping' air passages could curb severe asthma. Some patients with severe disease opt for cutting-edge surgery that "remodels" their airways to improve their breathing. Read more

Moderna asks for approval of second COVID booster shot. The company asked the U.S. Food and Drug Administration for emergency authorization of a second booster of its coronavirus vaccine for all adults, a significantly broader request than Pfizer had asked for earlier this week. Read more

Omicron COVID causing severe croup in some children. These can include cases that require hospitalization and intensive care, a new study shows. Read more

Diversity still elusive in America's medical schools. Money may be driving the trend, because wealthy students are overrepresented both overall and within each racial and ethnic group, a new report finds. Read more