Dear editor,I would like to remind parents that they have children immunized in time. Today, children of Rwanda routinely get vaccines that protect them from more than a dozen diseases such as measles, polio and tetanus. Most of these diseases are now at their lowest levels in history, thanks to years of immunization. Children must get at least some vaccines before they may attend school. Vaccines help make you immune to serious diseases without getting sick first. Without a vaccine, you must actually get a disease in order to become immune to the germ that causes it. Vaccines work best when they are given at certain ages. For example, children do not receive measles vaccine until they are at least one year old. If it is given earlier, it might not work as well. REMERA