The paragraph expands on the central idea that malaria was a deadly disease in Elizabethan England. However, it explains Elizabethan misconceptions about the spread of malaria.
I would say that sometimes you would not 'identify' a mistake in your head. Also if you read it out loud you might realize how it does not make sense in your sentence.
Hope this helped!
;D
Many people’s motto is to never give up.
