MADISON (WKOW) -- The Biden Administration is expected to announce that everyone who got the Pfizer and Moderna COVID-19 vaccines should get a booster shot -- but why do we need one, what exactly would that look like, and what about people who got the Johnson &Johnson vaccine? President Joe Biden will meet with his COVID team about boosters Wednesday, and the announcement for third shots could come after that. Federal agencies like the FDA and CDC would still need to sign off on any booster plan.