The Centers for Disease Control and Prevention and the National Foundation for Infectious Diseases hold the annual media briefing on the upcoming flu season.

From duplicate blood tests to unnecessary knee replacements, millions of Americans – especially older adults – undergo screenings, scans and treatments that offer little or no benefit every year. Researchers have estimated that 21 percent of medical care is unnecessary – a problem that costs the health care system at least $210 billion a year. Such “overtreatment” isn’t just expensive. It often harms patients.

Hear from authors of a new report about using law and policy interventions to increase fruit and vegetable intake and learn how a large city used regulation to improve availability of staple foods, including fruits and vegetables in retail settings.