// set app scope tooltip definitions here
var coreceptor = new TooltipKeyword("Co-Receptor:", "Located on the surface of a cell, this protein serves as a binding site for HIV.");

var hiv1 = new TooltipKeyword("HIV-1:", "This type of HIV is responsible for the majority of HIV infections worldwide.");

var hiv = new TooltipKeyword("Human Immunodeficiency Virus (HIV):", "The virus that causes Acquired Immunodeficiency Syndrome (AIDS). Two types of HIV have been identified: HIV-1 and HIV-2.");

var immunesystem = new TooltipKeyword("Immune System:", "The collection of cells and organs that protects the body from foreign invaders — including the thymus, spleen, lymph nodes, B- and T-cells, and antigen-presenting cells.");

var r5virus = new TooltipKeyword("R5 HIV:", "This type of HIV uses the co-receptor CCR5 (R5 for short) as a co-receptor to bind to and infect human cells. HIV is usually R5-tropic early on in infection, but the virus can use a different co-receptor as the disease progresses.");

var tcell = new TooltipKeyword("T-cell:", "A special type of blood cell responsible for helping your body fight off germs and infections.");

var tcellcount = new TooltipKeyword("T-cell Count:", "A measurement of the amount of T-cells found in a sample of blood.");

var tropism = new TooltipKeyword("Tropism:", "The tendency for a certain type of HIV to enter the T-cell at a preferred co-receptor site.");

var tropismtest = new TooltipKeyword("Tropism Test:", "A prescreening test given by your doctor that helps determine your tropism.");

var vl = new TooltipKeyword("Viral Load (VL):", "A measurement of the amount of HIV found in a sample of blood.");

var virus = new TooltipKeyword("Virus:", "A small organism that can cause an infection. Viruses cannot live on their own and need the cells of a living thing, called a host, to survive.");