To follow what mark says, it seems like the population most susceptible to the bacteria did in fact die off.

Children and pregnant women are most susceptible to lead health risks.

They do not, he said, kill all bacteria, only those that are most susceptible.

As a manifestation of language, the written word is the most susceptible to control.

Find the one who is most susceptible to your power.

The most susceptible areas are the roof, windows and doors.

Animals are most susceptible to the infection in the first year of life.

The elderly and children were most susceptible to a particularly quick death.

One would hardly have been able to predict, weeks ago, who later turned out to be the most susceptible.

Young children and the elderly are the most susceptible, the doctor said.