By Jimmy Rogers (@me)
Contributing Writer, [GAS]
Well it’s that time of year….of flu’s and rhinos (Rhinoviruses) and sniffles, OH MY! Yes, everyone seems to be getting sick. With all of these things going on, it might get you thinking…why now? Why do we always get sick more in the winter? Well to answer that question let’s look at the conventional wisdom. If you ask just about anybody off the street, they’ll tell you that the cold somehow weakens your body (maybe your immune system) and makes you more susceptible to disease. How do they know this? Well their mothers told them, of course!
So how does this affect our initial question? Well, if your internal temperature remains fairly constant in any weather, why does sickness increase in the winter? Almost every microbiology course I’ve taken has posed this question, because it’s a good one to make you think scientifically instead of anecdotally (relying on “conventional wisdom”).
As it turns out, one of the other effects of winter is that people tend to stay indoors more often. When the population stays indoors (in a closed air system) and in the presence of others for an extended period, the rate of infection increases. This is because at any given time, there are a few individuals infected with one of the many reoccurring (endemic) diseases. If those people had only limited contact with others, they might spread their colds or they might not. When they stay inside with everyone else, though, they successfully infect many more people.
While this answer may surprise some of you, I think the more impressive take-away is the regulatory ability of the human body. Despite cold winds or a scorching sun, we maintain that core body temperature like it’s our job. In some respects, it IS our body’s job. All living things must find ways to maintain internal conditions such as temperature, pH, and sources of energy. Without the existence of homeostasis, life as we know it would be impossible in our constantly changing world!
Have more questions on disease or homeostasis? Leave a comment or ask me on Twitter and I’ll try to puzzle it out with you!
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