 Hi, this is Wayne Allyn Root for Z-Stack and Z-Shield. Dr. Vladimir Zelenko works tirelessly to develop new formulas and products to protect you right up until the end of his life. His revolutionary Z-Stack product was based on his Nobel Prize-nominated Zelenko Protocol to boost your immune system against active viruses. But Dr. Zelenko was also searching for a way to address torment viruses and developed Z-Shield.