The birds lingered for days at a Catholic school near Cincinnati as agencies haggled over who was responsible for removing them. Officials said the public health risk was low.

Statistics show a clear spike in eight cancers in younger people, but that has brought a debate over whether many cases ever needed to be found.

© Michael Macor/San Francisco Chronicle, via Getty Images

While the president said he had an M.R.I. exam, a physician’s memo released by the White House was less specific.

© Tierney L. Cross/The New York Times