Body & Brain

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Yersinia pestis bacteria

TINY KILLERS  Acquiring one gene and one mutation allowed these plague bacteria, Yersinia pestis (shown in yellow in a flea’s digestive system in this colored scanning electron micrograph), to cause deadly pandemics. 

young man vaping

DANGERS OF VAPING  E-cigarettes have surpassed cigarettes as the most commonly used tobacco product among teenagers. Medical researchers are sounding the alarm.

people wearing surgical masks on subway in Seoul, South Korea

Commuters wear face masks on the subway in Seoul, South Korea. 

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