TABLE 5.

Postchallenge neutralization titers

Sample no.aImmunizedbTime (wk)c90% PRNTGMT
YFV/dengue-2 virus
    2.1131:1601:60d,e
    2.1231:80
    2.1331:80
    2.1431:20
    2.1531:80
    2.1631:160
    2.1731:40
    2.18+31:801:134d,f
    2.19+31:320
    2.20+31:80
    2.21+31:160
    Mock<1:20
    Positive1:4,000
YFV/dengue-4 virus
    4.1331:1601:101e,g
    4.1431:160
    4.1531:40
    4.16+31:3201:501f,g
    4.17+31:320
    4.18+31:1280
    4.19+31:320
    4.20+31:160
    Mock<1:20
    Positive1:8,000
  • a Mock and positive are described in Materials and Methods.

  • b −, not immunized; +, immunized.

  • c Weeks postchallenge.

  • d P < 0.05.

  • e P < 0.05.

  • f P < 0.05.

  • g P < 0.05.