Quidel Corporation develops, manufactures, and markets diagnostic testing solutions for applications primarily in infectious diseases, women's health, and gastrointestinal diseases. The company offers Sofia analyzer, a fluorescent immunoassay system for hospitals, Sofia influenza A+B and QuickVue influenza tests and QuickVue Strep A tests for the detection of group A Streptococcal antigen from throat swabs. Quidel Corporation was founded in 1979 and is headquartered in San Diego, California.