From the CDC's
Interim Public Health Recommendations for Fully Vaccinated People, released March 8th:
Fully vaccinated people can:
• Visit with other fully vaccinated people indoors without wearing masks or physical distancing
• Visit with unvaccinated people from a single household who are at low risk for severe COVID-19 disease indoors without wearing masks or physical distancing
• Refrain from quarantine and testing following a known exposure if asymptomatic
These recommendations apply to non-healthcare settings.