No abstract available
MeSH terms
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COVID-19
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Coronavirus Infections / prevention & control*
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Humans
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Mass Vaccination / methods*
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Pandemics / prevention & control*
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Pneumonia, Viral / prevention & control*
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Poliovirus Vaccine, Oral / immunology*
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Randomized Controlled Trials as Topic
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Vaccines, Attenuated / immunology*
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Vaccines, Live, Unattenuated / immunology*
Substances
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Poliovirus Vaccine, Oral
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Vaccines, Attenuated
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Vaccines, Live, Unattenuated