New York Times: Dr. Nancy Snyderman has stepped down from her post as NBC’s chief medical editor, following a controversy that erupted last fall when she broke a self-imposed quarantine after returning from covering the Ebola outbreak in Liberia. Dr. Snyderman drew criticism in October when she was seen in public in New Jersey days after promising to quarantine herself for 21 days. After an extended absence from television, Dr. Snyderman returned to the air in December, but the incident “tainted her relationship” with NBC.