Endangered

^(alt-text)

The list includes polio, Guinea worm, and this one particular enterovirus strain that they've been tracking out of spite after it went around the lab a few years ago.

We're pleased to announce a major update to xkcd, with new reading modes to enhance user experience. Select a mode via the menu below the comic.

Brought to you by our excellent design team: Amber, Benjamin Staffin, and Kevin.

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