Worries about gathering for the upcoming holidays amid the coronavirus pandemic are reminiscent of last winter, when the U.S. saw its biggest increase in cases, deaths, and hospitalizations.

This year, vaccines are available to all U.S. residents ages 5 and up, some of whom can even receive a booster shot.

“Although we’re still in this pandemic, at the same time, being vaccinated goes a really long way,” Dr. Lakshman Swamy, an ICU physician at Cambridge Health Alliance and Boston Medical Center, said on Yahoo Finance Live (video above) “I think if you’re having a small gathering, a couple of families indoors and everyone’s vaccinated — the adults, certainly — I’d honestly feel pretty safe about that, about not being masked.”

Swamy added that "it really changes when you add more variables in, like more and more families, more people coming from out of state, not everyone is vaccinated. I would start to really worry then."

Dr. Anthony Fauci, the country's top infectious disease official, made a similar point recently.

“If you get vaccinated, and your family is vaccinated, you can feel good about enjoying a typical Thanksgiving, Christmas, with your family and close friends,” Fauci told the Bipartisan Policy Center.

'Getting the kids vaccinated will do a lot there'

Cases have ticked up by 29% over the past 14 days, and the U.S. has surpassed a total of 47 million cases with 769,000 deaths from COVID-19.

An overwhelming majority of these deaths have been among the unvaccinated. There are currently 59.1% of Americans who are fully vaccinated and 69.4% who have received at least one dose.

And while these numbers are lower than desired by many public health professionals, Swamy is hopeful that many families can still have a safe holiday, especially since the recent approval of vaccines for children between the ages of 5 and 11 has proven to be a game changer.

“Getting the kids vaccinated will do a lot there,” Swamy said. “If you get your kid their first shot before the 20th of November, you should be able to have them fully protected by Christmas. I think that’ll go a long way.”

'It's going to be even worse in some cases'

Unfortunately, until vaccination rates improve, it could still be a dark winter ahead for unvaccinated families, especially those gathering together for the holidays.

“Last winter, we didn’t have vaccinations,” Swamy said. “We had a lot of indoor gatherings. We saw a big surge here in Boston after that. I’m worried that what we’re going to see now is the same thing. But with the unvaccinated and Delta, it’s going to be even worse in those cases. And that’s what we’re seeing in the North and the West right now.”