[lurk]

Yellow arm bands would be more visible. Maybe some clothes with vertical stripes.

[Billthedrill]

Maybe some clothes with vertical stripes.

Yeah, but getting them all together and isolating them would be better still. We could call these places "camps". Naturally no one would be allowed to leave until the government says the emergency is over...

[Lazamataz]

Yellow arm bands would be more visible. Maybe some clothes with vertical stripes.

Like this?

We could put the inspiring phrase over the gate of the camp: "Impfstoff Macht Frei!"