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What is herd immunity?Scientists use herd immunity to describe the point at which a population is sufficiently immune to a disease to prevent its circulation.
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Is the coronavirus airborne? Evidence is scant, infectious disease experts sayThe most important ways to prevent transmission are still the same, whether SARS-CoV-2 spreads via tiny droplets or larger ones.
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Keto diet may cause temporary flu-like symptoms. Here's what to expect.The first few weeks of a keto diet may come with a spate of flu-like symptoms, including nausea, fatigue and dizziness, according to a new study.
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Scientists may be 'on the cusp' of a universal flu vaccineWe may be one step closer to a universal flu vaccine, according to a new study.
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A 'normal' resting heart rate may not be so normal after allA new study finds that resting heart rate can vary between individuals by up to 70 beats per minute, calling into question how physicians use one of the most fundamental vital signs.
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US life expectancy finally ticks upward. But it's too soon to call it a trend, experts sayAlthough CDC data suggest an increase in life expectancy as of 2018, the U.S. continues to lag behind comparable countries.
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Declining Life Expectancy in America 'May Be the New Norm'U.S. life expectancy is declining mostly among "working age" Americans.
