Scientists Respond to CDC COVID Vaccine Guidelines: 'Asking for Trouble' On 3/9/21 at 7:08 AM EST New U.S. health advice that loosens restrictions for people who are fully vaccinated is a risky move that may be "asking for trouble," according to scientists. The Centers for Disease Control and Prevention (CDC) released guidance on Monday, saying people who have all necessary vaccine doses can visit other fully vaccinated people indoors without needing to wear a face-covering or physically distance. Under the new rules, fully vaccinated people can now meet with unvaccinated people from one other household without needing a mask indoors—as long as those people are considered to be at low risk of severe illness from COVID.