In the simulation you did, the disease was transmitted every time an infected person met an uninfected person who was not immune. In the real world, these people may not have become sick. Why not? State as many reasons as you can.

Germs are living things and may not survive the transaction.

Just because people meet does not mean that they will make contact.

An uninfected person may be able to fight off the infection before getting sick and passing it on to others.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave