Health officials of the US state of Illinois confirmed on Sunday that there are now 466 cases of A/H1N1 virus infection in the state.

Sunday's count was 45 more than Saturday's total and also included one probable case from Winnebago County, about 150 kilometers northwest of Chicago, officials of the Public Health Department of the state said.

Chicago Public Schools officials said North side Learning Center, a special education facility with 288 students in the northern part of the city, was closed on Friday, and will remain closed on Monday.

The US Centers for Disease Control and Prevention on Sunday reported there are 2,532 confirmed cases of the new flu in 44 US states, with three deaths.