(CNN) -- If you've gotten the Pfizer COVID-19 vaccine, you'll likely need a third dose within a year.
The CEO of Pfizer, Albert Bourla, says people are likely to need a booster dose of the vaccine 6-12 months after their first round.
From there, it will be an annual re-vaccination.
Officials are still testing the timing of follow-up vaccine doses.
Bourla shared the news during a CVS Health live event posted to Facebook Thursday.
He also added that real-world data shows the Pfizer vaccine is effective against a worrying variant of coronavirus first seen in South Africa.