A travel ban is a government-imposed restriction that prevents individuals from entering or leaving a specific country or region. These bans can be enacted for various reasons, including national security concerns, public health issues, or diplomatic disputes. Travel bans can affect specific nationalities, regions, or even entire countries, and they may be temporary or permanent. Governments often implement travel bans during crises, such as outbreaks of disease or conflicts. For example, during the COVID-19 pandemic, many countries imposed travel bans to limit the spread of the virus. Such measures can significantly impact tourism, international relations, and the economy.