SAN FRANCISCO (KGO) -- Chances are you've heard the message by now: stay home this holiday and don't travel. But new contact tracing information suggests that travel may actually pose a low risk of coronavirus transmission. It's the private household gatherings which happen after that are driving the spread, according to data. It's why health officials are so concerned. "We canceled everything," said Anna Silberman. Anna and Jeff Silberman from San Rafael are staying home this holiday, but their daughter is flying to Panama with friends. "Four flights to an island somewhere, as a concerned parent I said, 'what are you crazy?'" said Jeff Silberman.