Produced by the U.S. Public Health Service of the Federal Security Agency, this series of six posters still resonates today! They were designed by artist Seymour Nydorf (1914-2001), who designed a number of posters for the Public Health Service. Featuring a blonde waitress in a blue uniform and different white aprons, with her little blue hat when in the front of house, the style of the illustrations is more stylized than strictly true to life, but makes the point all the same.
All the advice in these posters still holds true today! Both in restaurants and at home. Except, these days, we'd have to add "wear a mask" to the list. But now, as then, restaurant workers have turned out to be much more essential than perhaps many people realized.