Pink eye is a kind of inflammation or infection on the transparent membrane (conjunctiva) that covers the white part of your eyeball and lines your eyelid. Since the small blood vessels in the conjunctiva are inflamed, they're more visible. Then your eyes appear to be pink or reddish.
Viral and bacterial pink eye are highly contagious and can be easily spread from person to person. Allergic pink eye is not contagious.
Actually, pink eye can be highly contagious for as long as two weeks after its symptoms begin. When the pink eye becomes severe, its infectious ability also increases. So, shaking hands with people whose hands have attached with eye secretions, or touching the same place where people with pink eye have touched will increase the possibility of being infected.
It should be noticed that people who have had pink eye may contract it again.
Keywords: infectious period pink eye