As more people get the vaccine, doctors are worried about people letting their guard down.
The CDC says some people feel once they get the shot, they can go back to life as normal.
Unfortunately, that's not the case.
Infectious disease specialist Dr. David Dodson warns that while the current vaccines are very effective, there are still some questions about how effective they may be against COVID variants.
The CDC also says it's unknown how long immunity can last after vaccination.
Until more data is collected in real-world conditions.