Listen, any article, advertisement, or blog that tells you that any supplement is going to protect you against viruses, infections, or disease is pushing their own agenda.
While many supplements will support and strengthen your immune system - no one ingredient or combination of ingredients is going to offer a bubble of protection against what's going around.
So why even talk about immune enhancing supplements? Because you can and should support your immune system. There are supplemental ingredients such as colostrum, coconut oil, elderberry, licorice DGL, turmeric, olive leaf extract, shiitake mushroom, maitake mushroom, goldenseal, lemon balm, green tea extract, oregano, basil, anise, aloe vera, echinacea, friendly flora bacteria, antioxidant vitamin C - and they all have been proven to strengthen your immune system.
And that's the point. You will be providing your immune system a defensive advantage in guarding the body. Even if you eat a well balanced diet, exercise and get the recommended amount of sleep, just the mere fact that you are functioning in this modern world creates an attack daily on your immune system. So during what the Centers for Disease Control deem as a flu season, November – May, you should give your defenses the fighting chance to do their job.