The virus is thought to mainly spread from person to person through these methods:

• Between people who are in close contact with one another (closer than 6 feet).
• Through respiratory droplets produced when an infected person coughs, sneezes or talks.These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs.
• Recent studies have suggested that COVID-19 may be spread by people who are not showing symptoms.
• Some recent recent cases have also been reported to involve people who previously had COVID-19 and have now been infected a second time.

To prevent yourself from contracting COVID-19:

• Wash your hands frequently with soap and water for at least 20 seconds. A good rule of thumb is to wash your hands after each public place, every time you cough, sneeze,  or blow your nose, and immediately when you return home.
• If soap and water is not available, use hand sanitizer with at least 60% alcohol and  rub every surface of your hands until dry.
• Avoid touching your face with unwashed hands.
• Cover your face in public with a cloth mask. Cloth masks reduce the amount of droplets and the range of the droplets thus preventing a potentially asymptomatic person who is unaware they have the virus from spreading COVID-19.
• Practice social distancing. Stay a minimum of 6 feet from any person. This greatly reduces your chances of being exposed to COVID-19.
• Cover your coughs and sneezes. The most efficient way to reduce the amount of droplets spread from your body is to cough or sneeze into the inside of your elbow.
• Clean and disinfect frequently touched surfaces daily. If the surface is dirty, clean it first. Use mild detergent and water and then use disinfectant.
• Monitor your health. Take your temperature regularly and be alert for fever, cough, shortness of breath, loss of taste, loss of sense of smell, congestion, or any other COVID-19 related symptom. If you have any symptom, stay home.

source CDC Corona Virus Disease 19 (COVID 19)