Producers paid $60,000 to shoot at the stadium. Filmmakers needed a big open space for their diseased cast and Candlestick appears to be it.
During the big finale, a helicopter will land in the middle of the field among the tents, military vehicles and about 1,000 actors. The scene is supposed to be of a large vaccination center.
Crews spent the past weekend shooting scenes in other parts of San Francisco, including a North Beach home.