I wonder if the stadiums will be packed full like they used to be if vaccines are given to the spectators... or will they be made to maintain the social distancing and follow previous health safety protocol/rules. People could easily put their trust in vaccine and start taking big risk in crowded places and with their bodies. Such people could make the disease more stronger and difficult to treat/cure.
I guess they will just accept people or audiences that have been vaccinated with the vaccine, the audiences would have to show proof that they have been vaccinated before they are allowed to go in and watch the game live.
There's still no implementing guidelines on this because we do not have a vaccine yet, the sports organizations want to get live audiences back they are losing revenues on the ticket sales, so we'll see how things will play out when we have the vaccine.