We cannot always tell when someone has an infection. Some people may be infected with a germ and not appear sick, but they may still be able to pass the germ on to others. Healthy practices help to reduce the chances of an infection spreading from one person to another.
Keep alcohol-based hand sanitizers handy and use them often.
Viruses can spread more easily.
For providers in care settings and facilities, there are routine infection control practices that should be followed.