People who cough or sneeze onto their hands and do not wash them regularly tend to spread viruses to ideal environments like, well, the plague.
the silk worms size increase so rapidly because a silkworm eats continuously.
paper
The influenza virus mutates so rapidly that a new "crop" requires a yearly vaccination. Each year you are getting vaccinated for a new virus.
Viruses reproduce rapidly by hijacking host cells and utilizing their resources to make copies of themselves. Once inside a host cell, the virus replicates its genetic material and assembles new viral particles. This process can happen quickly, leading to a rapid increase in the number of virus particles in the infected individual.
Rapidly rising production costs
Precipitate.
a pandemic.
increase in density, so it would sink more rapidly plato;)
because when fully grown,at about six weeks,the silkworm has increased its size seventyfold.
The population rapidly increased so they needed more space for them to stay
Drug resistance develops so rapidly because bacteria reproduce extremely quickly, giving a better chance for ones with resistance to develop and spread.
It is used to say that something has spread rapidly, and is popular. I suppose the idea is that it is spreading like a virus - widely and rapidly.