Omicron, the latest COVID-19 variant dubbed a “variant of concern” by the World Health Organization, has prompted new travel restrictions in many nations. Although little is known about omicron, scientists have expressed concern that it may be more transmissible or vaccine-resistant than previous variants. On Nov. 26, 2021, the United States joined a growing list of nations banning travelers from countries in […]

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Should countries that can afford COVID-19 booster vaccines offer them to residents if scientists recommend them? The director-general of the World Health Organization, Tedros Adhanom Ghebreyesus, has made his position clear, calling for countries to impose a moratorium on boosters until 10% of people in every country are vaccinated. His plea comes amid mounting concerns about the slow progress […]

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