Since you're here, listen to this.

You see, I found this thing...

Reimu...?

This here is an enchanted image to ward against smallpox.

Sorry, Kourin! See ya!

A long time ago, Hachijou-jima was said to have no smallpox due to the samurai Chinzei Hachirou Tametomo defeating its smallpox god.

She got the first move, dammit!

The smallpox god was colored a deep red and green, so similar things like this were used as wards and offerings to it.

Although, given that they've drifted to Gensokyo, their function against smallpox must've ended a while ago, but...

...Oh?