The Centers for Disease Control and Prevention (CDC) is releasing a new study that has some good news for Americans who are fully vaccinated against COVID-19.Ā 

CDC Director Dr. Rochelle Walensky told MSNBC’s Rachel Maddow, ā€œOur data from the CDC today suggest that vaccinated people do not carry the virus, don’t get sick.ā€

ā€œAnd that it’s not just in the clinical trials, but it’s also in real-world data,ā€ she added.

Watch the video below:

Scientists for the CDC conducted a study of 3,950 people who had received two doses of the vaccine from December through March. It found that two doses of the vaccine are 90% effective in preventing people from being infected with the virus.

Additionally, it found that one shot is 80% effective at preventing infection.

The participants of the study were given the Moderna and Pfizer-BioNTech vaccines which require two doses.

As Time Magazine reports, ā€œMost of the positive tests occurred in people who had no symptoms at the time they were tested, and did not even know they were infected.ā€

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However, the study did not examine whether the vaccines provided protection against variants of the coronavirus — which is why health experts encourage Americans to continue wearing masks even after being fully vaccinated.

The study comes as President Joe Biden is encouraging states to reinstitute mask-wearing mandates as the country is facing a 19% increase in new cases recorded per day compared to the prior two weeks.

But, Sen. Rand Paul (R-Ky.) is arguing that Americans who are fully vaccinated do not need to wear masks.

ā€œYou want people to get the vaccine, give them a reward instead of telling them the nanny-state’s going to be there for three more years, and you gotta wear a mask forever,ā€ he said during a Senate hearing with Dr. Anthony Fauci earlier this month.

He also argued that wearing masks after being vaccinated is ā€œjust theater.ā€