Yes. It is still possible to contract COVID-19, with these cases being known as "breakthrough cases." Although the vaccine is highly effective at preventing COVID-19, is not 100% effective. There is some evidence that vaccination may make illness less severe for those who are vaccinated and still get sick.
If you've been vaccinated, you should still watch out for symptoms of COVID-19, especially if you’ve been around someone who is sick. If you have symptoms of COVID-19, you should get tested and stay home and away from others.
You may choose to continue to wear masks and practicing physical distancing, even after you have been vaccinated. Learn more about After You've Been Fully Vaccinated.