By Staff

CAMBRIDGE (CBS) — Will there be a third shot in the arm for Moderna COVID vaccine recipients? The Cambridge-based biotech company says it’s making a booster shot for its two-dose vaccine regiment.

CEO Stéphane Bancel said last week that the third booster shot will be available to Americans by the fall, CBS News reported. 

READ MORE: Coronavirus In Massachusetts: Today's Developments

A third shot is not currently required but could offer additional immunity against coronavirus variants that are currently spreading in parts of the United States.

READ MORE: What To Know Before Booking Your Summer Trip

Moderna says research shows its vaccine is more than 90% effective against the virus six months after the second dose.

Pfizer’s CEO also said last week that a third dose will likely be needed.

MORE NEWS: Rideshare Customers Frustrated By Driver Shortage

Moderna’s two-shot vaccine is currently approved for emergency use in the U.S. for anyone age 18 and older. Staff