ISLAMABAD: Health authorities said on Saturday they had found poliovirus traces in a fourth environment sample in Pakistan's second largest city of Lahore, where the crippling disease last time paralyzed a child in July 2020.
Polio is a highly infectious and incurable disease caused by the poliovirus, which mainly affects children under the age of five. The virus invades the nervous system and can cause paralysis or even death in some cases.
