The resvlt showed that there was almost no change in the seasonal distribution of all the communicable cable diseases except the peak of measles was one month delayed after implementation of EPI.

• 流脑和痢疾有较强的季节性；百日咳和伤寒有一定的季节性；肝炎、脊灰和猩红热的季节性较差。这为我们调整传染病防治对策提供了科学依据。