WASHINGTON (AP) — A federal health official says revised guidance for health care workers treating Ebola patients will include protective gear "with no skin showing."

Dr. Anthony Fauci heads the National Institute of Allergy and Infectious Diseases. He tells ABC's "This Week" that those caring for an Ebola patient in Dallas were left vulnerable because some of their skin was showing.

The Centers for Disease Control and Prevention is working on revisions to safety protocols.

Ebola's incubation period is 21 days, and Fauci notes that mark is being reached Sunday for Dallas hospital workers who first treated the ill Liberian man.

Fauci tells NBC's "Meet the Press" that "the ones now today that are going to be 'off the hook' are the ones that saw him initially in the emergency room."

(Story by: The Associated Press)