Singer-songwriter Dana Parish and her doctor Steven Phillips discuss their new book, "Chronic"

It's predicted that about 10% of those once infected with Covid-19 could face serious and persistent symptoms. They're called Covid-19 "long haulers." And their stories resemble many with autoimmune problems…a hidden pandemic in itself which affects more than 50 million Americans.

Now in a new book called CHRONIC: The Hidden Cause of the Autoimmune Pandemic and How to Get Healthy Again, Yale-trained doctor Steven Phillips, MD, and his former patient, Sony/ATV Music singer-songwriter Dana Parish, who's written for Idina Menzel, Celine Dion & others, reveal striking evidence that a broad range of common infections, including COVID-19, cause a variety of autoimmune, psychiatric, and neurologic conditions.