Quidel Corporation is a provider of rapid diagnostic testing solutions, cellular-based virology assays and molecular diagnostic systems. The Company is engaged in the development, manufacturing, and marketing of rapid diagnostic testing solutions. These diagnostic testing solutions are separated into its four product categories: rapid immunoassay, cardiometabolic immunoassay, molecular diagnostic solutions, and specialized diagnostic solutions. It sells its products directly to end users and distributors, in each case, for professional use in physician offices, hospitals, clinical laboratories, reference laboratories, urgent care clinics, universities, retail clinics, pharmacies and wellness screening centers. Its diagnostic solutions aid in the detection and diagnosis of many diseases and other medical conditions, including infectious diseases, cardiovascular diseases and conditions, women’s health, gastrointestinal diseases, autoimmune diseases, bone health and thyroid diseases.