Studies on immunity in influenza. I. Long-term observation on virus activity and antibody status in a city population.

@article{TUNG1963StudiesOI,
  title={Studies on immunity in influenza. I. Long-term observation on virus activity and antibody status in a city population.},
  author={K T T'UNG and C C HAO and Peggy K Yen and Charles M. Chu},
  journal={Chinese medical journal},
  year={1963},
  volume={82},
  pages={1-8}
}