Mandatory 21-day quarantines on health care workers returning from Ebola-ravaged West Africa, like those put in place by three states, can have the unintended consequence of discouraging them from volunteering, a top federal health official said Sunday.

Dr. Anthony Fauci, director of the National Institute for Allergy and Infectious Diseases, discusses President Bush's $500 million plan to curb mother-to-child HIV/AIDS transmission.

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