When a person has acne, oily deposits harden and pores become clogged when the secretions cannot escape, they fill with: ?

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.

To check their medical records to see if they have had chicken pox before, if they haven’t, monitor their temperature, drink plenty of fluids, and stay away from small children and those who haven’t been exposed to chicken pox during the incubation period.