The cold season in Seoul can be extremely challenging, especially when temperatures plummet to near -7 degrees Celsius with a feels-like temperature of -12°C. To stay healthy during this brutal winter period, it's crucial to adopt comprehensive strategies that go beyond basic cold-weather precautions. Firstly, layering your clothing is essential. Start with thermal innerwear to retain body heat, add insulating layers, and finish with a waterproof, windproof outer layer to protect against cold winds and moisture. Covering extremities with gloves, hats, and scarves helps prevent heat loss as these areas are prone to cold exposure. Nutrition plays a vital role in maintaining immunity. Eating foods rich in vitamins C and D, such as citrus fruits and fortified dairy products, supports the immune system. Hydration is also important, even if you don't feel as thirsty in cold weather—drink plenty of warm fluids like herbal teas to stay hydrated. Adequate sleep helps the body repair and fend off infections. Aim for 7-9 hours per night despite shorter daylight hours that can disrupt sleep cycles. Physical activity, even moderate indoor exercises, boosts circulation and strengthens immunity. Just be cautious outdoors during extremely low temperatures between 10 PM and early morning hours when temperatures dip, as indicated by the hourly readings sliding from 18° to 16° Fahrenheit. Lastly, practicing good hygiene such as frequent hand washing and avoiding crowded places where viruses spread quickly can further reduce the risk of catching colds or flu. By combining these habits with mindfulness towards the cold climate and weather forecasts, you can significantly reduce the chances of falling ill this winter season in Seoul.