Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Longevity of serum neutralizing antibody titer after DENV infection*
# = animal number; FRNT = focus reduction and neutralization test; FRNT50 = reciprocal serum dilution at which 50% foci reduction occurred; – = FRNT50 titer ≤ 1:16; ND = not determined. Homotypic results are shown in bold. Shading indicates challenge virus.
