Chase, the original report of this experiment is on the website of the Library of Congress. If you care to read it for yourself, you will find that Mr Lind did not tell the entire story. Of course, that was not his intention because he was writing about another subject, but some very important information is there that directly affects your statement. One thing you will find is that disease was not as much an adverse condition as the fact that many of the colonists refused to work to care for themselves.