Sports stadiums asking fans for their "vaccine passports"

Top officials at the NBA and MLB believe the worst of the coronavirus pandemic is behind them and teams are starting to welcome fans back into stadiums. But to watch the game live, venues are asking visitors to prove they've been vaccinated by displaying what's called a vaccine passport. 

Oracle Park, home of the San Francisco Giants, and Citi Field, home of the New York Mets, are among a longer list of sports spaces that now require digital vaccine verifications. Those teams and others have been using an app called Health Pass from tech company Clear for the fan COVID screening process. In some cases, showing your status on Health Pass could be the difference between watching a game in-person or at home.  "Guests holding valid game tickets who cannot present proof of either a negative COVID-19 test within the required timeframes or proof of a COVID-19 full vaccination will not be allowed inside Yankee Stadium," the New York Yankees said in a statement posted on the team website Friday. "Guests may utilize Health Pass by Clear to confirm your COVID-19 test results for the event."