Your committee recommends that until such time as the efficacy, or the
lack of efficacy, of prophylactic vaccination against influenza is
established, vaccine if used, should be employed in a controlled manner,
under conditions that will allow a fair comparison of the number of
cases and of deaths among the vaccinated and non-vaccinated groups.
Particular attention should be directed to securing data as to the
period in the epidemic at which vaccinated and non-vaccinated persons
developed the disease.
Your committee is of the opinion that the indiscriminate use of stock
vaccines against influenza and influenza and pneumonia cannot be
recommended.
Nothing in these recommendations should be interpreted as discouraging
the use of a pneumococcus stock vaccine against lobar pneumonia.
This epidemic emphasizes the importance of properly equipped
laboratories.