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Pfizer's CEO announced that a booster dose of their COVID-19 vaccine might be needed within a year of full vaccination, with annual revaccination likely. Variants play a crucial role in this decision. The vaccine remains effective six months after the second dose. A survey shows 21% of American adults are unwilling to get vaccinated, a slight decrease from earlier surveys. Some prefer to wait and see how others respond to the vaccine. The report concludes with acknowledgments to Kaiser Health News and a look at health headlines.

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