Vaccination campaigns are organized efforts to immunize a large number of people against specific diseases. These campaigns often target illnesses like measles, polio, or COVID-19 and aim to protect communities by increasing the number of vaccinated individuals. Health organizations, such as the World Health Organization, work with local governments to provide vaccines, educate the public, and ensure easy access to vaccination sites. During a vaccination campaign, healthcare workers may set up clinics in schools, community centers, or even mobile units to reach more people. The goal is to create herd immunity, which helps prevent the spread of diseases and keeps everyone safer, especially those who cannot be vaccinated.