“susceptible population”簡單造句，susceptible population造句子

Objective To determine the infection status and immunity level of epidemic cerebrospinal meningitis in susceptible population in Hefei based on immunoserological surveillance.

Travel increases the risk for exposure to measles virus and its further spread into susceptible populations if not vaccinated.

In a given area, the worst will usually be over in four to six weeks as the virus rushes through a susceptible population, cases peak and infections decline with equal speed.