Bovine Viral Diarrhea Virus (BVDV) is a contagious virus that primarily affects cattle. It can cause a range of health issues, including respiratory problems, reproductive failures, and gastrointestinal diseases. The virus is transmitted through direct contact with infected animals or contaminated environments, making it a significant concern for cattle farmers. There are two main types of BVDV: Type I and Type II, each with different strains. Infected animals can show mild to severe symptoms, and some may become carriers, spreading the virus without showing signs of illness. Vaccination and biosecurity measures are essential for controlling the spread of BVDV.