Square Immune is the leading cold sore relief nationally. We proudly offer cold sore relief, HSV-1, and fever blister treatment in the United States! Contact us for all your cold sore prevention needs. Square-Immune is not a drug but a topical solution that stimulates a natural immune response. It interacts with skin proteins to trigger a mild delayed-type hypersensitivity response, similar to how poison ivy works. This response helps strengthen the immune system, which has weakened in today's environment. As a result, it may help combat chronic viral infections like cold sores, herpes, and HPV, as well as chronic fungal infections and autoimmune conditions. Visit our website to learn about our cold sore relief available nationally today!