WASHINGTON, Jan 3 (Reuters) - The interval between receiving a second dose of Moderna"s (MRNA.O) COVID-19 vaccine and a booster dose remains unchanged at six months, U.S. Food and Drug Administration Acting Commissioner Janet Woodcock said on Monday. "Right now if you got J&J you get a booster after two months, if you got Pfizer as your primary series you can get a booster at five months or beyond, if you got Moderna you can get a booster at six months or beyond whatever you decide to get a booster of," Woodcock said on a press call.