What precautions should someone take who has a compromised immune system to prevent contracting covid?

COVID 19 Precautions: Wash hands often with warm water & soap for at least 20 seconds. Avoid touching eyes, nose or mouth unless hands have just been washed. Use a face covering or mask when in public. Practice social distancing – stay at least 6 feet from others (outside of family you live with). Stay away from crowds. Stay home as much as possible. Eat healthfully & sleep adequate amounts.