The Centers for Disease Control and Prevention announced Monday it is no longer recommending that all children receive vaccines against: RSV, flu, hepatitis A, hepatitis B, meningococcal disease and rotavirus. Instead, the federal government now only recommends protection against these diseases for certain children at high risk.

The Chicago Department of Public Health says they are fighting the spread through testing and vaccinations — particularly in the Pilsen migrant shelter where the majority of cases are emerging.