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Vaccination
Double-Blind Method
Administration, Intranasal
Hemagglutination Inhibition Tests
Plaque Assay
Single-Blind Method
Neutralization Tests
Influenza Vaccines
Smallpox Vaccine
Attenuated Vaccines
Antibodies, Viral
Influenza A virus
Influenza B virus
Infants
Vaccinia virus
Virus Shedding
Human Influenza
Cold Temperature
Prospective Studies
Placebos
Co-Publications
10
6
5
4
3
2
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