<p>How many times did your mother tell you that you would get sick if you went outside in the cold? Sorry Mom, but the only illness you will get from going outside dressed improperly is <a href="https://www.verywell.com/how-to-treat-hypothermia-1298771" data-component="link" data-source="inlineLink" data-type="internalLink" data-ordinal="1">hypothermia</a>, not a cold or the flu.</p><p>Or is it the other way around? Whichever you have been told, neither is accurate. Your best bet is to stay hydrated and eat when you feel like eating.</p><p>Sorry, but this excuse doesn&#39;t hold any water. There are a few illnesses that can pass between animals and humans, but you likely won&#39;t catch a cold or the flu from Fido -- or Fluffy.</p><p>This one isn&#39;t a complete myth, but most research has shown that <a href="https://www.verywell.com/vitamin-c-and-the-common-cold-770455" data-component="link" data-source="inlineLink" data-type="internalLink" data-ordinal="1">vitamin C</a> doesn&#39;t do a whole lot for most people in treating or preventing the common cold.</p>If you have the flu, you definitely shouldn&#39;t be exercising. And believe me, if you really have the flu, exercising won&#39;t even be an option because you will feel much too bad. But a minor cold may not be a reason to stay on the couch. Get some guidance about exercising when you are sick.If you are pregnant and feel like you just can&#39;t stay well, it probably isn&#39;t your imagination. Pregnant women actually are more susceptible to illnesses such as colds and the flu.Many nursing mothers wonder if breastfeeding is safe when they are sick. Breast milk is so good for babies, it is almost always best to continue breastfeeding. Find out if you should breastfeed when you are sick or not.