A recent surveillance plan in a city aims to understand and control the epidemic of bovine diarrheal disease, a condition that can lead to significant weight loss, malnutrition, increased feeding costs, and even death in cattle. The disease can be caused by bacteria, viruses, parasites, and other factors. The plan involves collecting 960 samples from calves and bred cattle for laboratory monitoring, with results guiding a risk assessment and the implementation of prevention and control measures such as immunization, treatment plans, and disinfection. This initiative is designed to ensure the healthy and stable development of the city's cattle industry.