. >> reporter: a's president david cavel explained how they plan to keep fans and staff safe? are adhering to the guidelines. and obviously mandatory mask wearing. concessions will be delivered to your location. we have a testing program for the game day staff to make sure they are safe. >> how will they also run a vaccine site in the parking lot? >> the two can operate at the same time. the south lot is parking for the actual games and the two can co-exist in a meansful ray. >> reporter: counties in the red tier to play to 20%. in the orange tier, 33%. and jell-o, %. san francisco is the red tier. alameda county is in purple. >> we are purk, 40% ofht now, and that is going to accumulate as we vaccinate more people. >> reporter: the giants ceo says he hopes baseball will be a force for good. >> we look forward to everybody healing and baseball being a part of the healing. >> reporter: kate larson, nbc 7 news. >>> here is a look at the amount of games that can attend. a's ballpark, 9300 seats available. the giants say 20% capacity is 8400 fans. >>> the san francisco earthquake

. >> reporter: a's president david cavel explained how they plan to keep fans and staff safe?we are adhering to the guidelines. and obviously mandatory mask wearing. concessions will be delivered to your location. we have a testing program for the game day staff to make sure they are safe. >> how will they also run a vaccine site in the parking lot? >> the two can operate at the same time. the south lot is parking for the actual games and the two can co-exist in a meansful ray. >> reporter: counties in the red tier to play to 20%. in the orange tier, 33%. and jell-o, 67%. right now, san francisco is in the red tier. alameda county is in purple. >> we are purk, 40% of people are immune in the state right now, and that is going to accumulate as we vaccinate more people. >> reporter: the giants ceo says he hopes baseball will be a force for good. >> we look forward to everybody healing and baseball being a part of the healing. >> reporter: kate larson, nbc 7 news. >>> here is a look at the amount of games that can attend. a's ballpark, 9300 seats available. the giants say 20% cap