abc seven news education reporter leah melendez has more >> -- leah miller does has more. >> we are readyo resume. >> this is what reddy looks like in times of covid. plenty of windows open, hand sanitizer, reminders to follow the safety plan, and of course, masks for teachers and students. the san francisco health department says this should be enough to keep students safe. >> during the last year out of the 48,000 students in schools, both private, public, and charter, there were only seven documented cases of in school transmission. >> she says vaccinations remain a key part of their safety plan. all teachers must be vaccinated or submitted to a weekly covid test. 84% of children between the ages of 12 and 17 have been vaccinated in san francisco. the health department says evidence still shows that those under 12 who are not yet eligible for the vaccine are at low risk unless -- and less likely to spread the virus. >> from the beginning of the pandemic, they only represent around 7% of cases. >> lately, we are seeing a rise in cases because of the delta variant. >> the reality of the