The NFL is using 30 of its stadiums to the federal government as mass vaccination websites, according to a letter Commissioner Roger Goodell sent out to President Joe Biden.

The letter reads: “At this Sunday’s Super Bowl, the National Football League is honored to invite to the video game 7,500 immunized healthcare workers from throughout the nation, who will attend as our visitors in thankfulness for their heroic service and to highlight the importance of vaccinations as our country recuperates from the pandemic.

Our efforts will not stop there. The NFL and our 32 member clubs are committed to doing our part to ensure that vaccines are as widely available in our communities as possible. To that end, each NFL team will make its stadium available for mass vaccinations of the general public in coordination with regional, state, and federal health officials. This is currently being done at 7 NFL stadiums today. We can expand our efforts to arenas across the country more effectively due to the fact that much of our clubs have actually offered their centers formerly as COVID screening centers in addition to election websites over the past a number of months.

We eagerly anticipate further conversation with your administration along with your partners in state and city governments to advance this effort. Thank you for your management and for allowing the NFL to assist your public health efforts.”

Seven arenas are currently in usage as vaccination websites: the Arizona Cardinals, Atlanta Falcons, Baltimore Ravens, Carolina Panthers, Houston Texans, Miami Dolphins, and New England Patriots.