These are the latest, March 8th CDC guidelines for vaccinated people.

Interim Public Health Recommendations for Fully Vaccinated People
Updated Mar. 8, 2021
Key Points
This is the first set of public health recommendations for fully vaccinated people. This guidance will be updated and expanded based on the level of community spread of SARS-CoV-2, the proportion of the population that is fully vaccinated, and the rapidly evolving science on COVID-19 vaccines.

For the purposes of this guidance, people are considered fully vaccinated for COVID-19 ≥2 weeks after they have received the second dose in a 2-dose series (Pfizer-BioNTech or Moderna), or ≥2 weeks after they have received a single-dose vaccine (Johnson and Johnson (J&J)/Janssen ).†

The following recommendations apply to non-healthcare settings. For related information for healthcare settings, visit Updated Healthcare Infection Prevention and Control Recommendations in Response to COVID-19 Vaccination <https://www.cdc.gov/coronavirus/2019-ncov/hcp/infection-control-after-vaccination.html>.

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
As a researcher for Merck for 30 years and having helped develop two vaccines, These are the guidelines I trust now. My wife and I were vaccinated with the Pfizer vaccine. Pfizer has tested their vaccine in many different scenarios. See the google the link below for more info:

https://www.pfizer.com/news/press-release/press-release-detail/real-world-evidence-confirms-high-effectiveness-pfizer
Michael Romanowski
Vice President
Upstate Model Railroaders
www.upstatemodelrailroaders.com
518-423-7519