BOSTON (CBS) - Keep doing what we know works; that's the message from top health experts in Boston and across the country as we learn more about the latest COVID-19 variant Omicron.

"I will say, today, do not panic," said Dr. Shira Doron of Tufts Medical Center. "This is not an on/off switch. There is no scenario in which I envision these vaccines not working at all against Omicron."

Doron said those who are fully vaccinated - especially boosted - can live their lives. There is more COVID-19 out there, and we know the precautions that work against it.

Things like hand washing, social distancing and masking inside - a measure The Chelsea Board of Health has implemented again starting Friday.

Dr. Doron stressed to anyone still unvaccinated - now is the time.

"This is not the time to chalk up symptoms to a cold. Any mild symptoms whatsoever of a respiratory nature should prompt immediate testing and isolation until you have the results," Doron said.