Outbreaks of the Black Death are mainly dependent on migration patterns of the insect, rodent, and human carriers. Each country may be stricken a dozen times and gaps between each outbreak can go between 3 and 50 years. The plague strikes overpopulated and starved settlements and wanes when they are too thin, whether by death or quarantine, to infect new hosts.
The Black Death disappeared in winter because the whole plague came from infected fleas, and in the winter, fleas are dormant, so the fleas couldn't bite people to spread the disease. However, in the summer, fleas are not dormant, so they continue to spread the Black Death to people. This is ironic because most sicknesses are worse in the winter than in the summer.
dormant dormant
dormant
The word dormant is an adjective. Dormant means to be inactive or asleep.
It is active
dormant
dormant
"dormant / en dormant"
dormant
Its dormant
Dormant
it is dormant