How was sanitation the greatest problem facing urban areas in the late 20th century?

There was diseases going around quickly,and rapidly. Because surgeons was not washing there hands between surgeries and there tools.Also they smoked in the OR (operating room) they didn't use gloves back then either.

Question: Am I suppose to have just one sentence or a paragraph?

the big question intentionally left by halloween 2018 is whether michael myers is really dead or not. the last time we see him, michael is trapped in the cage just as laurie's house starts to burn. however, when the film cut back to the flames, the room appears empty.

explanation:

hope this and mark me as brainliest if you want.