BC High in Dorchester told parents today that it's moving to online classes tomorrow and Friday after getting notice today of its fifth student case of Covid-19 since last Friday.
In an alert to parents, Principal Adam Lewis says he is acting out of heightened caution in postponing in-school learning until Monday because contact tracing by the school shows the five students became infected outside the school.
"The students have been outstanding in the building but if they are not vigilant and safe when they are offsite, then it will invariably impact our ability to conduct in-person learning," Lewis wrote, adding the contact tracing showed "no transmission on campus, or within our BC High community."
Lewis reminded parents of the school's social compact, which requires that students, while off campus, follow "best practices," for minimizing their risks of contracting Covid-19: "The unfailing use of masks, keeping physically distant (six feet or more) from those outside your family or designated group, frequent and thorough hand washing, limited travel, and strict avoidance of all large gatherings."
The alert comes as Boston public-health officials say the 02125 and 02121 Zip codes now have the city's highest test positivity rates, at 9.7%, surpassing East Boston, which had long had the highest percentage of residents testing positive for the virus.