why 6 feet?

Should I wear a mask and maintain 6 feet of distance to help protect against COVID-19
In every location, all employees need to either maintain at least 6 feet of distance from other people at all times, or wear a mask. In clinical areas where 6 feet of space between people cannot be maintained, clinical masks (ear loop/procedure masks) need to be worn. Feb 19, 2021
Full answer in: health.ucdavis.edu
Why do we need to stay 6 feet apart?
Since people can spread the virus before they know they are sick, it is important to stay at least 6 feet away from others when possible, even if you—or they—do not have any symptoms. Social distancing is especially important for people who are at higher risk for severe illness from COVID-19.
Full answer in: www.cdc.gov
Why is social distancing important during the COVID-19 pandemic?
Everyone has a role to play in slowing the spread and protecting themselves, their family, and their community. In addition to practicing everyday steps to prevent COVID-19, keeping space between you and others is one of the best tools we have to avoid being exposed to this virus and slowing its spread in communities.
Full answer in: www.cdc.gov