<p>During Reeds lifetime, it was a common acceptance that yellow fever was spread by contact with infected items; such as the clothing or blankets of a person with
yellow fever.</p>
<p>During Reeds lifetime, it was a common acceptance that yellow fever was spread by contact with infected items, such as the clothing or blankets of a person with
yellow fever.</p>
<p>During Reeds lifetime, it was a common acceptance that yellow fever was spread by contact with infected items; such as, the clothing or blankets of a person with
yellow fever.</p>
<p>1 and 3 are incorrect. Semicolons join independent clauses. Independent clauses can standalone, i.e., they are complete sentences. The semicolons in 1 and 3 aren’t joining independent clauses.</p>
<p>1 and 3 are wrong, but so is 2 because yellow fever is not caused by sharing clothes or blankets with an infected person; however, it is caused by a mosquito, which could be present in a blanket of an infect person. I followed rule #3 from that website without violating standard English. :D</p>