A pandemic disease is an outbreak of an infectious disease that spreads rapidly across multiple countries or continents, affecting a significant portion of the global population.
Unlike localized epidemics, pandemics have widespread geographic reach and can cause severe illness, death, and social disruption on a global scale.
Examples include the COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2, the 1918 influenza pandemic, and the ongoing HIV/AIDS pandemic. Pandemics often require coordinated international efforts to mitigate their impact and control transmission.
