For example, they have a high fever, they have different types of body aches, they have headaches. And this is when inside the block there's a high level of these viral agents, the HIV agent. So basically the individual experiences flulike symptoms, fever, aches and so forth and has a high level of virus in the body. Now, the middle stage is the stage when the person doesn't actually experience any symptoms. So you have no way of actually knowing whether or not you are carrying the virus. The only way that you can know is if you go get tested.