Omicron: Everything You Need to Know About the New COVID-19 Variant
The key to the concern about the new variant is the high number of mutations of the spike protein.
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U.S. Joins Europe in Banning Travel From Southern Africa Amid Fears Over Omicron
The World Health Organization classified Omicron as a highly transmissible variant of concern.
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One Lonely, Wealthy Man's Crusade Against the Polio Vaccine
Most people celebrated Salk's shot. This soda-hating businessman did not.
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