There is currently no vaccine to prevent coronavirus disease 2019 (COVID-19). The best way to prevent illness is to avoid being exposed to this virus. The virus is thought to spread mainly from person-to-person:
Between people who are in close contact with one another (within about 6 feet) - Avoid close contact with people who are sick. Put distance between yourself and other people. This is the “social/physical distancing” that is recommended. This is especially important for people who are at higher risk of getting very sick. The vulnerable population previously discussed (those with heart disease, lung disease, etc).