It’s that time of year again. No, not just the holidays, but the time where it seems that everyone is becoming sick. Perhaps you’re one of the lucky ones that’s not [yet] been afflicted. So you’re avoiding making contact with people with symptoms – telling that coughing coworker to stay at home to spare the rest of your team. And you’re not touching those infested subway poles. And you wash your hands all the time, just to be safe. I call this mindset the contagion model, where a person becomes sick if they’re exposed to agents that contain infectious bacteria or viruses – people and objects included. While there’s a lot of truth to this way of thinking, I feel we rely too much on it. The contagion model is rendered moot by the resilience model, where one can avoid illness altogether by strengthening and conditioning their bodies in various means. This seemingly impossible feat results from developing a strong immune system and a stress buffer. Thus, even if a resilient individual is exposed to infectious pathogens, her body is able to resist and ward off the potential illness.

Although I’m not a doctor, I’ve mixed together a slew of information, from microbiology to stress research, with self-experimentation and introspection to develop this model. Here’s the kicker – as of this writing, I haven’t been sick since December 2005. That’s 6 years! At worst, I’d feel like I have something coming down which slightly bothers me for a day, and then it’s gone. Now, because I only have a single data point – myself – it’s not entirely clear what factors are more prominent to building resilience. Still, I have a bunch of ideas that I consider to be significant factors.

The body is more likely to succumb to illness when it is placed under stress. So it’s important to keep oneself in tip-top shape by eating well, being very physically active, and getting plenty of sleep. I should note two important things I had done in 2005, when my illness-free streak began: I stopped drinking soda and I began serious martial arts training. My body has felt amazingly better since. Likewise, pursuing meaningful or enjoyable activities (in both work and play) and being social go a long way keep us unstressed and consequently stave off illness. If this perspective sounds familiar, it’s because this is core and time-tested health advice, not to mention a central point of this blog. I believe the way we live on a day-to-day basis most profoundly prevents sickness.

Shocks to the body are bad – like going from the toasty indoors to the freezing winter outside – so it’s helpful to acclimate oneself to the new season. Every Fall the past few years, I’ve gradually exposed myself to the colder outside temperatures. I tend to keep the indoor temperature on the low side, like in the 60s. And participating in outdoor physical activities, like roller blading, means putting up with moderately unpleasant cold temperatures as the season carries on. By the time the days get nastily cold, my body has a new set point and tolerance – I never have to feel the intense blast of cold in the dead of winter because my body is already used to the moderate cold. Reducing the cold imbalances in the season means reducing the chance of a cold in your system.

We should embrace germs instead of fearing them. I’m vehemently against the common use of antibacterial soap and hand sanitizers. Here’s why: not all bacteria are bad and we humans have evolved to coexist with many bacteria in mutually beneficial ways. There’s a trillion bacteria on our skin surface and most of them are either beneficial or don’t cause harm. The actual benefit is very interesting, because these typical skin bacteria often prevent the pathogenic bacteria from taking hold on the skin surface. Let this sink in – the bacteria that normally reside on our skin surface essentially give us a force field that protects us from infectious pathogens. Now what happens when we use antibacterial soap or hand sanitizers that kill off everything? The skin becomes a clean slate and an open invitation to all bacteria – good and bad. Think about this the next time you go for the antibacterial product.

The immune system is like a muscle. It requires a consistent workout to maintain its strength. Like an atrophied bicep that can barely lift a thing, a coddled immune system offers little protection when it’s called to action. Our bodies are designed to be exposed to the elements. A minor infection here or there gives the immune system practice and information. It helps us develop immunity and preps our bodies for the big game when flu season comes around. Hence, we shouldn’t be afraid to get a little dirty sometimes.

As I mentioned, these are a few ideas that have come from a lot of experimenting and consideration of the way the human body works. I understand that it may be a bit unconventional, or perhaps blasphemous. But at the very least, I know that something is working. It’d be nice to have some more data points. Have a healthy and resilient winter!