What are the most effective herbal antiviral remedies for boosting the immune system?

Some of the most effective herbal antiviral remedies for boosting the immune system include echinacea, elderberry, astragalus, garlic, and ginger. These herbs have been traditionally used to support the body's natural defenses against viruses. It is important to consult with a healthcare provider before using herbal remedies, especially if you have any underlying health conditions or are taking medications.