Mayor Walsh said today that the percentage of people testing positive on Covid-19 tests had dropped to 4% for the week ending Nov. 20 over the week before, the first time numbers have dropped in at least five weeks.
But both Walsh and Health and Human Services Chief Marty Martinez said at a City Hall press conference that people need to keep taking precautions, especially tomorrow.
"One week of data does not make a trend," Martinez said.
Walsh urged people to spend Thanksgiving with just members of their personal households, but said that if people ignore him on that, they should wear masks even if indoors, open windows, practice the usual social distancing - so no couch sharing with relatives, especially older ones - and designate just one person as the day's food server. Plus, everybody should frequently wash their hands and surfaces.
And, he added, people who tested negative in the days before Thanksgiving shouldn't take that as an excuse to disregard standard precautions tomorrow, "honest to God," because one negative test could mean you just haven't started churning out new viral particles, and other people around you might be infectious.
Walsh said the improved Covid-19 numbers were seen almost all over the city - not a single neighborhood had a positivity rate above 8%, he said. Mattapan did show a slight increase.
Because the decrease is just for one week, Walsh said it's too early to start talking about easing any restrictions, some of which remain tougher in Boston than in most of the rest of the state. He added the city will continue to have to research tightening restrictions should the numbers start going up again.
BPHC core metrics for Covid-19.