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  1. 1561
    “…Remarkably, these titers kept rising during the repeated virus challenges, although no viremia resulted. …”
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    Live-virus exposure of vaccine-protected macaques alters the anti-HIV-1 antibody repertoire in the absence of viremia
  2. 1562
    “…RESULTS: IgG-AECA >1:100 were detected in 25% (5/20) of patients with definite SuS and in 4.3% (3/70) of the controls. Median titers were significantly higher in SuS (1:3200, range 1:100 to 1:17500) than in controls (1:100, range 1:10 to 1:320); IgG-AECA titers >1:320 were exclusively present in patients with SuS; three controls had very low titers (1:10). …”
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    Clinical, paraclinical and serological findings in Susac syndrome: an international multicenter study
  3. 1563
    “…A U.S. virulent PEDV prototype isolate (USA/IN19338/2013) with known infectious titer was serially ten-fold diluted in virus-negative cell culture medium. …”
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    Effect of Porcine Epidemic Diarrhea Virus Infectious Doses on Infection Outcomes in Naïve Conventional Neonatal and Weaned Pigs
  4. 1564
    “…RESULTS: IgG purified from rabbits immunized with 0.1, 1, 10 or 50 µg doses of the VAMAX vaccine candidate cocktail was analysed for total IgG and antigen-cocktail-specific titers. An increase in cocktail-specific titers was observed between 0.1 and 1 µg and between 10 and 50 µg, whereas no significant difference in titers was observed between 1 and 10 µg. …”
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    Analysis of the dose-dependent stage-specific in vitro efficacy of a multi-stage malaria vaccine candidate cocktail
  5. 1565
    “…RESULTS: Vaccine antibody titers decreased across all four HPV types at week 72 compared to week 28. …”
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    Anogenital human papillomavirus virus DNA and sustained response to the quadrivalent HPV vaccine in women living with HIV-1
  6. 1566
    “…Within 17 days of vaccination, 86/89 (96%) adults developed a four-fold rise in vibriocidal titer. Gut microbial diversity was not significantly changed after vaccination. …”
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    622. Increased IgA Coating of Gut Microbes After Administration of Killed, Whole-Cell Oral Cholera Vaccine
  7. 1567
    “…Similarly, significant differences were found between adults and children in their antibody titers against the P[4], P[8], and P[11] VP8* genotypes, having the children higher antibody titers than adults. …”
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    Sero-epidemiological study of the rotavirus VP8* protein from different P genotypes in Valencia, Spain
  8. 1568
    “…Factors associated with NAb titers were analyzed using Ordinary Least Squares regression model. …”
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    SARS-CoV-2 neutralizing antibody levels are correlated with severity of COVID-19 pneumonia
  9. 1569
    “…In comparison, between the CPE-based and the IPA-based (i.e., the reference titer) methods, the titer measured with CPE evaluation 4 to 5 days after infection using VeroE6/TMPRSS2 cells showed a much smaller difference from the reference titer than that measured using other cells. …”
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    A Cytopathic Effect-Based Tissue Culture Method for HCoV-OC43 Titration Using TMPRSS2-Expressing VeroE6 Cells
  10. 1570
    “…Worse baseline clinical severity (P=0.018), elevated C-reactive protein during hospitalization (P=0.033), and higher baseline anti-TPO titer (P=0.005) were associated with a significant increase in anti-TPO titer. …”
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    Insights from a Prospective Follow-up of Thyroid Function and Autoimmunity among COVID-19 Survivors
  11. 1571
    “…While SARS-CoV-2 antibody titers were equal among sexes, an age-dependent decrease could be observed. …”
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    Evaluation of Antibody Responses to COVID-19 Vaccines among Solid Tumor and Hematologic Patients
  12. 1572
    “…Multivariate analysis demonstrated dialysis dependence to be strongly associated with lower antibody responses and antibody titers waning with time. Age, low serum albumin and low lymphocyte count were also associated with lower seroconversion rates and antibody titers. …”
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    Diminished and waning immunity to COVID-19 vaccination among hemodialysis patients in Israel: the case for a third vaccine dose
  13. 1573
    “…We observed a high level of correlation between neutralizing and SARS-CoV-2 spike protein-specific antibody titers. The half-life of neutralizing titers was estimated at 100.7 days (95% confidence interval = 44.5–327.4 days, R(2) = 0.106). …”
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    Long-term persistence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein-specific and neutralizing antibodies in recovered COVID-19 patients
  14. 1574
    “…The NAb titers were significantly lower in RA patients after the third immunization compared with HC. …”
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    Third dose of anti-SARS-CoV-2 inactivated vaccine for patients with RA: Focusing on immunogenicity and effects of RA drugs
  15. 1575
    “…Serum titers of SARS-CoV-2 neutralizing antibodies (nAb) correlate well with protection from symptomatic COVID-19, but decay rapidly in the months following vaccination or infection. …”
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    Surface-modified measles vaccines encoding oligomeric, fusion-stabilized SARS-CoV-2 spike glycoproteins bypass measles seropositivity, boosting neutralizing antibody responses to omicron and historical variants
  16. 1576
    “…No consistent correlation with vitamin D levels was observed among the 3351 available anti-spike protein antibody titers of convalescent subjects. However, the median anti-spike protein antibody titers tended to increase over time in the vitamin D-deficient group. …”
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    SARS-CoV-2 Infection-Blocking Immunity Post Natural Infection: The Role of Vitamin D
  17. 1577
    “…Increases also were stimulated in serum microneutralization titers (MNT) to drifted strains of H3N2 (Fig 2) & in serum NAI (Fig 3) and mucosal sIgA (Fig 4) titers. …”
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    33. Intranasal M2SR (M2-deficient Single Replication) Live H3N2 Influenza Investigational Vaccine Induces Serum HAI & Broad Immune Responses in High Proportion of Adults
  18. 1578
    “…Neutralizing antibody titers against WA1/2020 strain were detected in 44% of patients but only 16% of patients had neutralizing antibody titers against Omicron before booster vaccination. …”
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    CLL-515 Antibody Responses Against SARS-CoV-2 Variants after Booster Vaccination in Patients With B Cell Non-Hodgkin Lymphoma and Chronic Lymphocytic Leukemia
  19. 1579
    “…Similarly, for shikimate derived p-coumaric acid, the titer of sZJD-28-based strain was 0.68-fold higher than for CEN.PK113-11C-based one, with a 0.98-fold increase in specific titer. …”
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    A highly efficient transcriptome-based biosynthesis of non-ethanol chemicals in Crabtree negative Saccharomyces cerevisiae
  20. 1580
    “…Nucleocapsid antibody immunoassay study with 302 coronavirus disease 2019 (COVID-19) patients showed lower titers in immunocompromised patients (P < 0.001), higher titers in higher severity (P = 0.031), and different seroconversion rates and titers according to variants of concern. …”
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    Clinical Utility of Sero-Immunological Responses Against SARS-CoV-2 Nucleocapsid Protein During Subsequent Prevalence of Wild-Type, Delta Variant, and Omicron Variant
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