At least as of 2011: "Collins remains actively involved in research, studying the molecular genetics of diseases including cancer and adult-onset diabetes. His group also is developing animal models of genetic disorders to test potential therapeutic approaches." [0]

[0] Kresge N, Simoni RD, Hill RL. The Molecular Genetics of Cystic Fibrosis: The Work of Francis Collins. J Biol Chem. 2011 Aug 12;286(32):e8–9. doi: 10.1074/jbc.O111.000248. PMCID: PMC3151108