booster dose Recommendation United States of America COVID-19
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Pfizer-BioNTech vaccine children Recommendation United States of America COVID-19
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booster dose Recommendation Argentina COVID-19
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booster dose Recommendation Australia COVID-19
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children Pfizer-BioNTech vaccine Recommendation Canada COVID-19
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Risk factor All age groups China COVID-19
Risk factor Adults (18+) Elderly (65+) China COVID-19
Risk factor All age groups China COVID-19
Risk factor Adults (18+) Elderly (65+) Canada COVID-19
booster dose Recommendation Canada COVID-19
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