Possible side effects In addition, many patients report side effects such as body aches, fatigue, mild fever, or even worsening cold-like symptoms after receiving the shot. For some, these symptoms can linger for days or weeks. The AlternativeBut there’s good news: your God-given immune system is the best defense you have. When it’s nourished, supported, and functioning properly, it can recognize and fight off viruses naturally, is more effectively than a mismatched vaccine. Here’s how to prepare your immune system for flu season: 1. Boost your immunity naturally. Take Vitamin C, Vitamin D, Zinc, and Quercetin daily. These nutrients work together to strengthen your immune defenses and shorten recovery time if you do get sick. |