smallflyingtaco on 05 March 2009
They might be undergoing Chemo, or taking some sort of immuno-suppresant drugs. Perhaps they are just out to get some nice entertainment before heading home to rest, relax, and kill 'sorta' zombies.
EDIT: Or I guess there are other answers related to Japan, I am just accustom to living near a major cancer center where it is not uncommon to see people wearing masks.
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