No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Antibodies / analysis
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Antibody Formation
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Child
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Child, Preschool
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Complement Fixation Tests
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Disease Reservoirs
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Female
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Hospitalization
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Humans
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Infant
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Male
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Michigan
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Middle Aged
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Mycoplasma Infections / epidemiology*
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Mycoplasma Infections / immunology
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Orthomyxoviridae Infections / epidemiology*
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Orthomyxoviridae Infections / immunology
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Population Surveillance
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Respiratory Syncytial Viruses*
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Respiratory Tract Infections / epidemiology*
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Respiratory Tract Infections / immunology
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Seasons
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Time Factors