COVID-19
vaccine introduction
national prioritization of immunization
Recommendation
Nigeria
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COVID-19
dosing schedule
COVID-19 variants
Background paper
United States of America
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COVID-19
vaccine effectiveness
Background paper
United States of America
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COVID-19
vaccine administration
Background paper
United States of America
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COVID-19
safety
Background paper
United States of America
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COVID-19
safety
Background paper
United States of America
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COVID-19
safety
Background paper
United States of America
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COVID-19
children
Background paper
United States of America
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COVID-19
children
epidemiology
Background paper
United States of America
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AstraZeneca COVID-19 vaccine
Background paper
United States of America
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