Correctional officers at the Rikers Island correctional facility in New York, March 12, 2015. Brendan McDermid/Reuters The CDC advises anyone who's been in close contact with someone with coronavirus to quarantine for 14 days. Close contact was previously defined as being within 6 feet of an infected person for more than 15 consecutive minutes. But a new study shows that a correctional officer got sick after a series of very brief interactions with inmates who later tested positive. That led the CDC to change its guidance to say that more than 15 minutes of cumulative exposure to someone with COVID-19 puts you at risk. Visit Business Insider's homepage for more stories. As the pandemic marches on, many people have taken solace in the idea that as long as we keep our interactions with others brief, our coronavirus risk will remain low.But new research from the Centers for Disease Control and Prevention found that people can get sick after spending very brief moments near people with COVID-19.