Influenza Immunization

Excerpt

This statement was issued by the Advisory Committee on Immunization Practices (U. S. Public Health Service) from its meeting in May 1967.

During the winter and spring of 1966-67, the influenza reported in the United States was limited to minor outbreaks and individual cases. Type A2 influenza virus was recovered only from several small outbreaks in the eastern States. Type B virus was identified in the Southwest, particularly in California and Arizona. Excess mortality attributed to pneumonia and influenza did not reach the national "epidemic threshold" at any time, and it did not remain elevated for more than a single