U.S. health officials Wednesday redefined what counts as close contact with someone with COVID-19 to include briefer but repeated encounters. For months, the CDC said close contact meant spending a solid 15 minutes within 6 feet of someone who tested positive for coronavirus. On Wednesday, the CDC changed it to a total of 15 minutes or more — so shorter but repeated contacts that add up to 15 minutes over a 24-hour period now count. The CDC advises anyone who has been in close contact with a COVID-19 patient to quarantine for two weeks.