Summarize this article in one sentence.
You can never wash your hands too much. You should especially wash your hands after you've used the bathroom and before you eat. It is also helpful to get into the habit of washing your hands after you've been out in public, or have touched public door handles, elevator buttons, or railings. Your hands are your connection to the world. Unfortunately, that means they're probably covered in dirt, oil, bacteria and other stuff you don't want to think about, especially before you've washed them. This is especially important if either you or the other person are currently feeling ill. But just to be safe, because many illnesses can be contagious when the person isn't symptomatic, it's best just to avoid sharing anything, with anyone, that touches your mouth. Make sure your vaccinations and immunizations are up-to-date. If you can't remember when you last had one, speak to your doctor in some cases, it's better to get a shot early than not at all. These immunizations will help keep away many illnesses like the flu or the measles that have a fever as a symptom. Note that it is not uncommon for an immunization with an active virus to give you temporary symptoms, including a fever, in the few days following the shot. Make sure you're aware of these possible side effects by speaking to your doctor.
Wash your hands. Do not touch your face. Do not share bottles, cups, or cutlery. Get your regular immunizations.