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For the control and potential eradication of measles, immunization coverage should be at least 85%. Achieving this level of coverage is essential to establish herd immunity and protect those who cannot be vaccinated, such as infants and individuals with certain medical conditions. Measles is a highly contagious viral disease that can lead to serious complications, including pneumonia, encephalitis, and death. The measles virus spreads through respiratory droplets from coughing and sneezing. Herd immunity occurs when a critical portion of the community is immunized against a contagious disease, thereby providing indirect protection to unvaccinated individuals. While 100% coverage is ideal, public health experts determine that at least 85% coverage is necessary to interrupt the transmission of the measles virus and prevent outbreaks.

**_ Coverage of 80% is relatively high but not sufficient to establish herd immunity for measles. The basic reproductive number (R₀) for measles is very high (between 12-18), requiring higher immunization coverage to prevent outbreaks. While 90% coverage is more than adequate and improves the level of protection, health authorities typically set the minimum effective coverage at 85% for practical public health goals. Achieving 90% is often an aspirational target. Although 100% coverage would theoretically ensure the complete eradication of measles, it is practically unattainable due to medical contraindications, access issues, and vaccine hesitancy. The goal is to reach a high enough coverage to achieve herd immunity, typically set at 85%. Immunization coverage of at least 85% is crucial to controlling and potentially eradicating measles. This level of coverage ensures sufficient herd immunity to prevent outbreaks and protect vulnerable populations who cannot be vaccinated.