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  1. 2341
    “…METHODS: Antibody titers were determined in venous blood serum in the ECLIA test using the Cobas e411 Roche analyzer. …”
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    The Influence of Two Priming Doses of Different Anti-COVID-19 Vaccines on the Production of Anti-SARS-CoV-2 Antibodies After the Administration of the Pfizer/BioNTech Booster
  2. 2342
    “…Based on GADA titers, patients were grouped as GADA negative (n = 238), GADA low positive (antibody titers < 1,000 RU/mL, n = 5), and GADA high positive (antibody titers ≥ 1,000 RU/mL, n = 4). …”
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    Elevated IL-6 plasma levels are associated with GAD antibodies-associated autoimmune epilepsy
  3. 2343
    “…RESULTS: Plaque assay showed viral titers between 0.15 ± 0.01×10(7) and 1.95 ± 0.09×10(7) PFU/mL while viral titer by TCID(50) assay was between 0.71 ± 0.01×10(6) to 4.94 ± 0.80×10(6) TCID(50)/mL for the five SARS-CoV-2 isolates. …”
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    Comparison among plaque assay, tissue culture infectious dose (TCID(50)) and real-time RT-PCR for SARS-CoV-2 variants quantification
  4. 2344
    “…Titers in BAU/mL were reported as geometric mean and 95% CI per cohort. …”
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    Phase I randomized, observer-blinded, placebo-controlled study of a SARS-CoV-2 mRNA vaccine PTX-COVID19-B
  5. 2345
    “…In those with vitamin D deficiency, we found a non-significant trend towards lower antibody-titers at T3, and significantly lower titers at T4 as compared to those not vitamin D-deficient, also observing a more pronounced antibody-titers negative drop from peak-T2 and T4 in those with vitamin D deficiency. …”
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    Lack of vitamin D predicts impaired long-term immune response to COVID-19 vaccination
  6. 2346
    “…The percentages of seroprotection, seroconversion, geometric mean titer and factor increase in the geometric mean titer were calculated. …”
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    Immunogenicity of influenza H1N1 vaccination in mixed connective tissue disease: effect of disease and therapy
  7. 2347
    “…Blood samples were obtained and checked for HBsAg, HBeAg, and the titers of Anti -HBsAb as well as Anti- HBeAb with ELISA. …”
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    Hepatitis B Recurrence After Liver Transplantation: A Single Center Experiences and Review the Literature
  8. 2348
    “…Both IM and ID devices produced high-titer anti-SNV neutralizing antibody responses in rabbits and NHPs. …”
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    A Hantavirus Pulmonary Syndrome (HPS) DNA Vaccine Delivered Using a Spring-powered Jet Injector Elicits a Potent Neutralizing Antibody
Response in Rabbits and Nonhuman Primates
  9. 2349
    “…In patients with pre- and post-vaccination data available, 83.9 % in the pneumococcal study demonstrated protective antibody levels with PPSV23 (titer ≥1.6 μg/mL to ≥3 of 5 antigens), and 81.2 % in the influenza study achieved protective antibody levels (titer ≥1:40 to ≥2 of 3 antigens) at Day 28 post-vaccination. …”
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    Antibody response to pneumococcal and influenza vaccination in patients with rheumatoid arthritis receiving abatacept
  10. 2350
    “…However, the antibody titers induced by H7 viruses were significantly lower when measured by HI and MN assays. …”
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    Inactivated H7 Influenza Virus Vaccines Protect Mice despite Inducing Only Low Levels of Neutralizing Antibodies
  11. 2351
    “…This is supported by observations of reduced functional opsonophagocytic assay (OPA) antibody titers in subjects who received PPSV23 first compared with PCV13 first. …”
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    Sequential Administration of PCV13 Followed by PPSV23 Results in a More Robust Immune Response in PPSV23-Naïve Adults Age 60–64 Years
  12. 2352
    “…Neutralizing antibody titers against DENV-2 (Cosmopolitan, Asian I, and Asian/American genotypes) and DENV-1 were determined using a conventional plaque reduction neutralization assay. …”
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    Genotype-specific and cross-reactive neutralizing antibodies induced by dengue virus infection: detection of antibodies with different levels of neutralizing activities against homologous and heterologous genotypes of dengue virus type 2 in common marmosets (Callithrix jacchus)
  13. 2353
    “…A dose-dependent boosting of nAb titers was observed after doses 2 and 3, with the highest titers in the Alum-adjuvanted 2.0 µg dose recipients. …”
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    LB18. An Enveloped Virus-like Particle (eVLP) Cytomegalovirus (CMV) Vaccine Is Immunogenic and Safe: Results of a First-in-Humans Study
  14. 2354
    “…For the MenACWY-TT and MenACWY-PS groups, respectively, the MenACWY-TT booster dose elicited rSBA titers ≥1:8 in 100% and ≥98.0% of subjects (figure); 100% and ≥96.1% of all subjects had titers ≥1:128. …”
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    1478. Efficacy and Safety of a Booster Dose of the MenACWY-TT Vaccine Administered 10 Years After Primary Vaccination with MenACWY-TT or MenACWY-PS
  15. 2355
    “…For the MenACWY-TT and MenACWY-PS groups, respectively, the MenACWY-TT booster dose elicited rSBA titers ≥ 1:8 in 100% and ≥ 98.0% of subjects (figure); 100% and ≥ 96.1% of all subjects had titers ≥ 1:128. …”
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    2722 B. Efficacy and Safety of a Booster Dose of the MenACWY-TT Vaccine Administered 10 Years After Primary Vaccination with MenACWY-TT or MenACWY-PS
  16. 2356
    “…At 6 weeks post the booster, the ISA 206 group had 1 animal with IgG titer less than 1:128 while all the animals in the SO-VE-GS group retained IgG titers of more than 1:128. …”
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    Enhanced Immune Responses with Serum Proteomic Analysis of Hu Sheep to Foot-and-Mouth Disease Vaccine Emulsified in a Vegetable Oil Adjuvant
  17. 2357
    “…The seroconversion rates of three types of poliovirus antibodies in participants with maternal antibody titer ≥1:32 were significantly lower than those in participants with maternal antibody titer < 1:8 and 1:8 ~ < 1:32. …”
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    The effect of maternal poliovirus antibodies on the immune responses of infants to poliovirus vaccines
  18. 2358
    “…A positive SARS-CoV-2 spike protein antibody titer (SP-AbT) was detected in 23% of assessable patients. …”
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    Post-Vaccination Anti-SARS-CoV-2-Antibody Response in Patients with Multiple Myeloma Correlates with Low CD19+ B-Lymphocyte Count and Anti-CD38 Treatment
  19. 2359
    “…Eighty-six participants showed a substantial decline in antibody titer from Rounds 2 to 3. Persons aged 45 or older had higher mean titer than people aged younger than 45 years. …”
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    Waning of Anti-spike Antibodies in AZD1222 (ChAdOx1) Vaccinated Healthcare Providers: A Prospective Longitudinal Study
  20. 2360
    “…Two hn-plasmas, which were in the best 1% of 340 neutralizing activity-determined convalescent plasmas, were intraperitoneally administered to SARS-CoV-2-infected hamsters, resulting in a significant reduction of viral titers in lungs by up to 32-fold compared to the viral titers in hamsters receiving control nonneutralizing plasma, while with two moderately neutralizing plasmas (mn-plasmas) administered, viral titer reduction was by up to 6-fold. …”
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    Highly Neutralizing COVID-19 Convalescent Plasmas Potently Block SARS-CoV-2 Replication and Pneumonia in Syrian Hamsters
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