Keep calm and wash hands: themed posters of the last century

Hand washing helps prevent many diseases, as well as reduce their spread. This simple procedure, which takes no more than a minute, is a great way to eliminate many types of germs. Hungarian doctor Ignaz Semmelweis in the middle of the XIX century especially noted the benefits of hand washing. In addition, he insisted on thorough sterilization of medical instruments. In the XX century, posters were printed in different countries that drew attention to the need to keep your hands clean. Here are some of them.