China closes live poultry markets amid deadly flu outbreak

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China is ordering the closure of live poultry markets in its south-central regions as it grapples with the worst outbreak of bird flu…

GOP leaders unveil new health law outline, divisions remain

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House Republican leaders sketched broad outlines of a replacement for President Barack Obama’s health care law…

First non-travel Zika virus case reported in Nevada

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A woman has been diagnosed with Zika virus in Clark County in Nevada…

China reports more H7N9 bird flu cases

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H7N9 has entered its peak season in China, and direct contact with live poultry remains the main source of infection…

Dense breasts may be leading risk factor for breast cancer

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Women whose breasts are composed largely of glandular tissue, rather than fat, have an amplified risk of breast cancer…