Medical expert: The J&J vaccine 'pause' is a 'concern'
White House Chief Medical Adviser, Dr. Anthony Fauci, breaks down what led the FDA and CDC to issue a pause and how long the world will have to wait before it’s lifted. SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK https://www.facebook.com/abcnews FOLLOW ABC News on TWITTER: https://twitter.com/abc
