Infectious Disease Emergence and Resurgence

Infectious disease emergence and resurgence refer to the ways new diseases appear or existing diseases reappear after a period of decline. Emergence involves pathogens spreading into new areas or hosts, often driven by factors like global travel, environmental changes, or mutations. Resurgence occurs when control measures weaken or fail, allowing diseases to re-emerge, often in more resistant or widespread forms. Understanding these patterns helps in early detection, prevention, and effective response to protect public health.