WATCH: Biden says there's a lot of reasons to be hopeful in 2020

During Tuesday's White House meeting with the COVID-19 response team, President Joe Biden mistook what year it was by a full two years.

"There's a lot of reason to be hopeful in 2020," Biden told Americans. It must be noted that it is in fact, 2022.

During the same meeting, Biden stressed once again that the current surge in COVID019 cases was a "pandemic of the unvaccinated," yet ignored the fact that some of those currently testing positing with the virus are vaccinated.

"This continues to be a pandemic of the unvaccinated. So we gotta make more progress," said Biden. "You know, be concerned about Omicron but don't be alarmed. And if you're unvaccinated, you have some reason to be alarmed, many of you will, you know, you'll experience severe illness in  many cases if you get COVID-19 If you're not vaccinated, some will die needlessly die."

"unvaccinated are taking up hospital beds and crowded emergency rooms and intensive care units that's displaced other people need access to those hospitals," Biden continued.

"So please, please, please get vaccinated now. You know, we've reduced the number of American adults without any shots from 90 million to about 35 million in the past six months. There's still 35 million people not vaccinated," he added.

While being vaccinated does protect against getting the virus, according to CDC data, the number of people getting COVID-19, whether vaccinated or not, has risen since October.

Most recently, Defense Secretary Lloyd Austin tested positive for COVID-19 and was exhibiting "mild" symptoms, despite being fully vaccinated and boosted.

Days prior, Rep. Ayanna Pressley also tested positive for the virus, despite being fully vaccinated and boosted as well.

During Tuesday's press conference, Biden also stressed the importance of getting children vaccinated, as many students returned to school this week after the December holidays.

"And for patients who still haven't gotten your kids vaccinated, please get them vaccinated. Look out for their interest here is the best way to protect them," said Biden.

"Schools can and should be open this winter, we have all the tools to keep kids safe. Unvaccinated kids are at risk, yet the vaccinated are going to … best way to protect them. Get vaccinated. If you're vaccinated, get boosted," he added.