BUFFALO, N.Y. (AP) — Federal authorities warned against the infection risks of using insulin pens on more than one patient, and officials on Monday asked why a Buffalo veterans hospital may have used the pens on many patients, causing an HIV scare.

More than 700 patients admitted to the Veterans Affairs Western New York Healthcare System over a two-year period may have been exposed to HIV, hepatitis B and hepatitis C, officials said following a review that found that multi-dose pens intended for use by a single patient may have been used on more than one person.

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