vaccines.gov Rank 137.7K. Estimated value 15,876$patientengagementhit.com Rank 531.2K. Estimated value 4,068$firefighternation.com Rank 417.9K. Estimated value 5,184$platinumplanner.com Rank 334.5K. Estimated value 6,492$iaff.org Rank 462.1K. Estimated value 4,680$ajpmonline.org Rank 631K. Estimated value 3,420$phe.gov Rank 433.2K. Estimated value 5,004$getvaccineanswers.org Rank 101.2K. Estimated value 21,648$hsi.com Rank 170.4K. Estimated value 12,804$immunize.ca Rank 1.8M. Estimated value 1,164$