Why were people who contracted polio put into quarantine?

before polio vaccines were available, polio outbreaks caused more than 15,000 cases of paralysis each year.

polio outbreaks in the U.S. increased in frequency and size, crippling an average of more than 35,000 people each year

Explanation:it was very contagious and didn't show signs or symptoms from the start when you got it.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.