Health Health

Monday

Researchers at the U.S. Geological Survey National Wildlife Health Center in Madison, Wis., use eggs to see if the Asian strain of the H5N1 bird flu virus has entered the U.S. in this photo from 2006. Andy Manis/AP hide caption

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Andy Manis/AP

Saturday

Mosquitoes like this one can carry the virus that causes dengue fever, which may become a bigger problem in some regions as biodiversity is lost. James Gathany/CDC Public Health Image Library hide caption

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James Gathany/CDC Public Health Image Library

Friday

Kathy Del Tonto (far right) participates in a class that teaches school cafeteria workers how to prepare meals from scratch. LiveWell Colorado hide caption

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LiveWell Colorado

Photographer Freya Najade journeys into the weird sci-fi world of Europe's agricultural production. In one cow-milking facility she visited, "two people are needed to milk twice a day 300 cows," she writes. Freya Najade hide caption

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Freya Najade

John Kelly and Dr. Marcia Angell were advocates on opposing sides of a Massachusetts measure to legalize physician-assisted suicide. Jesse Costa/Jesse Costa/WBUR hide caption

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Jesse Costa/Jesse Costa/WBUR

Dr. Jame Abraham used positron emission tomography, or PET, scans to understand differences in brain metabolism before and after chemotherapy. Dr. Jame Abraham hide caption

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Dr. Jame Abraham

Thursday

People visit a memorial outside Sandy Hook Elementary School in Newtown, Conn., on Dec. 15. Spencer Platt/Getty Images hide caption

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Spencer Platt/Getty Images

Shootings Leave Sandy Hook Survivors Rethinking The Odds

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Visitors to one Kansas City hospital will no longer be able to buy a Big Mac on the premises. Keith Srakocic/AP hide caption

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Keith Srakocic/AP

Wednesday

The number of new drug shortages each year in the U.S., from 2001 through Dec. 21, 2012. University of Utah hide caption

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University of Utah

How A Drug Shortage Hiked Relapse Risks For Lymphoma Patients

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Brain scans using Amyvid dye to highlight beta-amyloid plaques in the brain. Clockwise from top left: a cognitively normal subject; an amyloid-positive patient with Alzheimer's disease; a patient with mild cognitive impairment who progressed to dementia during a study; and a patient with mild cognitive impairment. Slide courtesy of the journal Neurology hide caption

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Slide courtesy of the journal Neurology