Winter is coming. And as temperatures start to change, so does your overall health. However, with the right preparation, you stand a better chance against the negative health effects.Perhaps the biggest health event associated with winter is flu season. Opposite of the common cold, influenza viruses are spread throughout the air. The virus especially thrives in winter months due to the cold, dry air.Not only does cold dry air help with the spread of the flu virus, but it also leaves our immune system weaker. Double whammy.One of the best ways to be proactive in protecting against the flu is by boosting your immune system. This will have much greater impact on your overall health.Some of the best ways to improve your immune system is by eating a healthy diet with fruits and vegetables, getting adequate sleep, exercising regularly, maintaining a healthy weight, and washing your hands. Imperative to benefitting from exercise and maintaining a healthy weight is optimizing your testosterone levels. Unsurprisingly, according to studies, testosterone also takes a hit during winter months. To learn more about preventing low testosterone this winter, check out The Testosterone Optimization Therapy Bible. After all is said and done, even after taking the right steps, none of us are completely immune to illness. If you come down with the common cold, make sure to avoid contact with others and take any over-the-counter or prescribed medications that work for you.As temperatures drop, our immune system also becomes more susceptible to cold sores, which are more common than you might think. According to the World Health Organization, nearly two-thirds of people under the age of 50 (3.7 billion) worldwide are diagnosed with HSV-1 (oral herpes). If you suffer from cold sores, many topical remedies exist. However, if you prefer a more subtle approach, Valacyclovir is a 24-hour remedy in the form of two pills.When illness becomes more serious, choose to be proactive instead of reactive when deciding to contact your physician.