lines at covid test sites. federal health officials say the cdc is likely to issue further guidance on testing as part of their five-day isolation and quarantine periods. the problem is pcr tests can show a positive result for weeks longer than rapid tests. rapid tests are still in short supply. former surgeon general jerome adams weighed in on that. you should get a rapid test if you can. the problem is that the administration has not yet delivered the rapid tests. so they didn t want a policy telling you to do something this reflected blame back on them. in boston where families waited in long test lines for the return to school, officials say more than 1,000 teachers and staff members were out today. the teacher s union president telling the boston globe most of the absences appear to be covid related. back here in atlanta, the marta transit system is warning customers that some of its rail