H1N1 pandemic (2009)

The 2009 H1N1 pandemic was caused by a new influenza virus, often called "swine flu," which spread rapidly worldwide. It originated in Mexico and quickly affected people of all ages, especially young adults and children. The virus was contagious through coughs, sneezes, and close contact, leading to a surge in flu cases and hospitalizations. Public health responses included increased surveillance, vaccination campaigns, and awareness efforts. While most people recovered fully, the pandemic highlighted the importance of global cooperation in controlling infectious diseases and prompted improvements in preparedness for future outbreaks.