Cancer patients. Organ transplant recipients. Individuals with HIV. Those with autoimmune or chronic inflammatory conditions such as lupus, multiple sclerosis and rheumatoid arthritis.

An estimated 10 million people in the United States are considered immunocompromised, including those who were born with immune-system deficiencies. It often makes them more susceptible to infections and puts them at a higher risk of experiencing a more severe outcome when they get sick. Read more