RESULTS OF IMMUNIZATION BY MEANS OF ACTIVE VIRUS OF HUMAN INFLUENZA

^{Department of Pediatrics, School of Medicine, University of Pennsylvania, Philadelphia}

^{Children's Hospital of Philadelphia, Philadelphia}

These studies were assisted by a grant from the Bureau of Animal Industry, United States Department of Agriculture, and by the Lyophile Serum Fund donated by the Board of Managers of the Abington Memorial Hospital.

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^{Department of Pediatrics, School of Medicine, University of Pennsylvania, Philadelphia}

^{Children's Hospital of Philadelphia, Philadelphia}

These studies were assisted by a grant from the Bureau of Animal Industry, United States Department of Agriculture, and by the Lyophile Serum Fund donated by the Board of Managers of the Abington Memorial Hospital.

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^{Department of Pediatrics, School of Medicine, University of Pennsylvania, Philadelphia}

^{Children's Hospital of Philadelphia, Philadelphia}

These studies were assisted by a grant from the Bureau of Animal Industry, United States Department of Agriculture, and by the Lyophile Serum Fund donated by the Board of Managers of the Abington Memorial Hospital.

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^{Department of Pediatrics, School of Medicine, University of Pennsylvania, Philadelphia}

^{Children's Hospital of Philadelphia, Philadelphia}

These studies were assisted by a grant from the Bureau of Animal Industry, United States Department of Agriculture, and by the Lyophile Serum Fund donated by the Board of Managers of the Abington Memorial Hospital.

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^{Department of Pediatrics, School of Medicine, University of Pennsylvania, Philadelphia}

^{Children's Hospital of Philadelphia, Philadelphia}

These studies were assisted by a grant from the Bureau of Animal Industry, United States Department of Agriculture, and by the Lyophile Serum Fund donated by the Board of Managers of the Abington Memorial Hospital.

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