This is one of three briefs based on research conducted under the Illinois-New York Child Care Research Partnership that examines changes in the supply of quality child care in Illinois available to subsidy-eligible families during the study period 2011 through 2016. This brief explores the early record of subsidized families' access to quality infant care during the first years of ExceleRate Illinois and the federal Early Head Start-Child Care Partnership grants. This brief examines changes to the supply of quality infant care, whether this care was affordable to the parents who participated in the child care subsidy program, the Illinois Child Care Assistance Program (CCAP), and whether quality infant supply grew in the communities where subsidy-eligible families live. The study covers two Illinois regions: Cook County, which includes Chicago and its inner suburbs, and a group of seven counties in Southwestern Illinois that range from rural to urban: St. Clair, Madison, Bond, Clinton, Monroe, Randolph, and Washington counties. This brief makes no precise causal claims about the relationship between policy and the supply of affordable, quality infant care. (author abstract)