Testing and quarantine are complementary strategies in disease control: 1. Identifying Asymptomatic Carriers: Testing helps identify individuals who are infected but asymptomatic, enabling timely quarantine. 2. Monitoring and Release: Regular testing during quarantine can determine if individuals have contracted the disease, guiding decisions on when to release them from quarantine. 3. Reducing Spread: Together, testing and quarantine help break the chain of transmission, reducing the overall spread of the disease.