ER doctor on antibody tests: 'the truth is, they're not all that reliable'

03:30

Dr. Dara Kass, an ER doctor currently treating covid patients at Columbia University Medical Center, joins Andrea Mitchell to discuss her own experience with antibody tests and provide guidance on them after the CDC issues a warning that fewer than half of those tests could be accurate. Dr. Kass says that their lack of reliability means "we can't make large scale decisions yet" based on the information they give.