polio surveillance

Polio surveillance involves monitoring for cases of poliovirus infection to prevent and control outbreaks. This is done by examining reports of paralysis, especially in children, since polio can cause paralysis. Health workers also collect or test sewage samples to detect the presence of the virus even if no symptoms are observed. This combined approach helps officials identify virus circulation early, assess the effectiveness of vaccination programs, and take timely actions to eliminate the disease. Effective surveillance is crucial to ensure that polio is eradicated worldwide and to maintain a polio-free status.