Factbox-Countries weigh need for booster COVID-19 shots

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By Reuters Staff (Reuters) – Many countries are preparing to make COVID-19 vaccine booster shots available, but there is no consensus among scientists that they are necessary and the World Health Organization wants the most vulnerable people worldwide to be fully vaccinated first. Here are some of the options countries and regions are considering: NORTH AMERICA The U.S. Centers for Disease Control and Prevention (CDC) on Sept. 24 backed a booster shot of the Pfizer and BioNTech vaccine for Americans aged 65 and older, some adults with underlying medical conditions and some adults in high-risk …

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