Global pandemic

A global pandemic occurs when a new infectious disease spreads easily across multiple countries and continents, affecting a large proportion of the population worldwide. This widespread transmission often results in widespread illness, strain on healthcare systems, and significant social and economic impacts. Pandemics typically arise from pathogens that humans have little or no immunity against, making containment and control challenging. Examples include the 1918 flu and COVID-19. Managing a pandemic involves coordinated efforts such as public health measures, vaccination, and international cooperation to reduce transmission and save lives.