<p>Background: When was the outbreak?</p><p>Study objective not clear and not "SMART"</p><p>Methods: An abstract should be stand alone. The authors are referring to an outbreak investigation which readers &nbsp;are not privy to; and probably should have been part of the methods</p><p>How were cases/controls identified? Any case definitions?&nbsp;</p><p>What influenced or informed the variables included/studies.</p><p>&nbsp;</p><p>Results:</p><p>Conclusion: not supported by findings</p>