手を洗おー!
A series of images in which beautiful girls, including anime characters, were used in [[poster (medium)|]]s produced by the Saitama prefectural government's medical maintenance division to promote the prevention of O-157 between 2001 and 2002.

Arguably the most notable posters produced during this time featured the characters of [[Azumanga Daioh]] illustrated by series creator [[Azuma Kiyohiko]] depicting [[Kasuga Ayumu]] looking [[looking_at_viewer|obliquely upward]] with both [[outstretched hand|hands stretched out]] [[outstretched_arms|to the front]], with "手を洗おー!" (Tewoaro-! - meaning "[[washing|Wash]] your [[hands]]!) inscribed with cute letters.

These were posted on public facilities in Saitama Prefecture, and in the [[bus]]es that traveled around the prefecture. Inspired by the public relations campaign, [[parody|parodies]] made with many characters have become popular on the [[Internet]]. As of 2019, parodies of these posters have made a resurgence due to the global COVID-19 pandemic.
tewoarao-!