3. A leucocytosis in influenza, as a rule, indicates a secondary
infection.
4. The pneumonia following influenza shows, as a rule, but a very
moderate leucocytosis, while, on the other hand, the presence of a
leucopenia is by no means infrequent.
We are greatly indebted to Miss R. Thompson, Messrs. Mock, Frost,
Marshall and Scott for their assistance in this work at the Magee
Hospital.