Most commonly, the virus that causes COVID-19 enters people’s bodies when it’s on their hands and they touch their mouths, noses or eyes. A virus is so tiny that you can’t see it. This is why it’s important to wash your hands often and try not to touch your mouth, nose or eyes. If someone who has the infection coughs or sneezes on you from a close distance — closer than six feet — then that also can spread the virus.