UpdatedMon, Feb 22, 2021 at 1:16 pm ET Reply(1) Distancing of 6 feet is now 'recommended to the greatest extent possible' in Chester and Delaware county school districts. (Shutterstock) CHESTER COUNTY, PA — Updated guidance went out to school superintendents in Chester and Delaware counties on Friday, relaxing wording in 6-feet distance standards, drawing a hard line that says 3-feet of distance must be kept at all times. Chester County Health Department's guidance update also underscored the CDC's guidance that vaccination access should not be a factor in school district decisions about reopening for in-person instruction. Chester County Health Department advised school districts that when the incidence rate is below 100 per 100,000 residents and percent positive of cases is below 10 percent, distancing of 6 feet is "recommended to the greatest extent possible," and "at no time is less than 3 feet permitted."