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How Will You Know If Your Neighbors Have Gotten the Vaccine?

In almost every sci-fi movie about a pandemic, there’s some trinket to differentiate the immune from the potentially infected. In 2011’s Contagion, the vaccinated received bar-coded wristbands; in the extremely triggering trailer for the forthcoming Michael Bay produced movie Songbird (a movie that asks “what if COVID but worse?”), K.J. Apa’s character flashes a yellow wristband to show he’s not a