The best way to protect yourself is to assume that everyone you come in contact with could be a pre-symptomatic or asymptomatic carrier. Along with social distancing, it’s vitally important to practice good hygiene. The World Health Organization (WHO) recommends these  protection measures for everyone:
Practice respiratory hygiene  when coughing or sneezing
Stay at least 6 feet away from an infected person
Use alcohol-based hand sanitizer when you can’t wash your hands
Wash your hands with soap and water frequently
Make sure everyone in your household brushes up on proper nose-blowing techniques