are a family of large RNA viruses that infect mammals and birds and cause respiratory infections and disease. There are seven known human coronaviruses that originally appear to have come from animals. Of these seven human coronaviruses, four are largely benign and cause 25-30% of the common cold cases.

Dr. Tom Frieden, the CDC director from 2009 to 2017, wrote, “Developing a COVID-19 vaccine is the most important thing we can do to restore some order and normalcy in our world.” It is true.