ERRATUM
Volume 85, no. 1, p. 410–421, 2011. Page 410: The byline should appear as shown above.
Page 417, Fig. 4 should appear as shown below.
Page 417, legend to Fig. 4: The last three lines should read “representative samples depicted) (d). The number of days since defervescence from day 0 (d0) to day 213 (d213) are indicated after the patient identification. (e) Enhancement assays were performed over the acute time course of an individual with Den2 and known to have had primary Den1 exposure.”