LUSAKA, Feb. 24 (Xinhua) -- Zambia on Tuesday declared an outbreak of poliovirus in accordance with the International Health Regulations after samples collected from a wastewater treatment plant in Lusaka, the country's capital, tested positive for the virus.
Acting Minister of Health Cornelius Mweetwa said the virus was detected through the country's environmental surveillance system, noting that no confirmed clinical cases of polio-related paralysis have been reported.
