Viralex Attack supports a rapid immune response to challenges towards the bodys immune system. The unique ingredient EpiCor starts working in 2 hours and along with other key ingredients; Olive Leaf, Pelargonium Root and Zinc, supports the bodys natural immune defences for optimal health and wellbeing. What is EpiCor? EpiCor is scientifically researched to support the bodys defences by offering antioxidant properties and supporting a healthy, natural immune response. EpiCor helps to maintain a healthy immune system by supporting the bodys ability to initiate the proper immune response at the appropriate time and it starts working in only 2 hours. EpiCor is a registered trademark of Embria Health Sciences, LLC.