The blood samples were kept cold and transported within a couple of hours to the Matlab hospital laboratory, where plasma was immediately separated and stored at -70[degrees] C until transported frozen to the Dhaka laboratory for the analysis of total immunoglobulins (IgG, IgE, and IgA) and C-reactive protein in preimmunization
plasma and MMR vaccine-specific plasma IgG in preand postimmunization plasma.
Among persons with preimmunization
titers of <1:4, most had hSBA titers of [greater than or equal to]1:4 at 1 month after the second dose (13/13 for Bexsero  and 9/10 for Trumenba).
Evaluation of the protective capacity of new mild Citrus tristeza virus (CTV) isolates selected for a preimmunization
epidemiology of hepatitis B virus infection in South African children.
Compared with individuals born in the preimmunization
era, children who develop hepatitis B infection despite immunization are at higher risk of developing hepatocellular carcinoma, the investigators noted.
Blood samples were obtained from each bird preimmunization
, at 7 d after primary immunization, and at 4, 7, 10, 18, 32, and 63 d after secondary immunization.
(immediately before vaccination) and post-immunization (up to 24 hours after delivery) blood samples, with a minimum interval of three weeks between pre and post-immunization samples, were collected from 57 pregnant women (28 MN and 29 C).
defined an abnormal response as a postimmunization antibody concentration not reaching either 1.3 mg/L or a 4-fold increase above the preimmunization
concentration for at least 5 of the 9 serotypes (7).
In all dilutions used, the absorbances obtained for post-immunization IgY exceeded that of preimmunization
IgY (3.6- to 5.7-fold).
The definitive method is immunizing with specific antigens and assessing preimmunization
In the late 1980s there was a partial resurgence, but at a much lower incidence level than had characterized the preimmunization
serum samples showed no detectable hSBA titers against any of the 6 isolates (Table).