A public health crisis occurs when a health issue significantly impacts a large population, overwhelming healthcare systems and resources. Examples include outbreaks of infectious diseases like COVID-19 or Ebola, which can lead to widespread illness and death. These crises often require immediate action from governments and health organizations to control the situation and protect public safety. Factors contributing to public health crises include poor sanitation, lack of access to healthcare, and environmental issues. Addressing these challenges involves collaboration among various sectors, including public health officials, governments, and community organizations, to implement effective prevention and response strategies.