Not long. Pink eye is highly contagious and can spread quickly. You need to see your doc and get treated right away. In the mean time, make sure to wash your hands frequently.
Fast. Very contagious from eye to eye and person to person. Wash hands. Don't touch eyes. Wash sheet, pillowcases, towels and don't share these.
Around a week. While pink eye has a number of causes, the most common is infection with adenovirus, of which there are 53 serotypes. It can also cause a febrile respiratory illness. Studies of military recruits exposed to adenovirus in their living quarters indicates that it generally takes around a week before they generally show signs & symptoms. The virus is hardy & can live on doorknobs, towels, for weeks. Read more...