Comparison of adjuvants for a spray freeze-dried whole inactivated virus influenza vaccine for pulmonary administration

2015 ◽  
Vol 93 ◽  
pp. 231-241 ◽  
Author(s):  
Harshad P. Patil ◽  
Senthil Murugappan ◽  
Jacqueline de Vries-Idema ◽  
Tjarko Meijerhof ◽  
Aalzen de Haan ◽  
...  
Keyword(s):  
Influenza Vaccine ◽  
Pulmonary Administration ◽  
Freeze Dried ◽  
Virus Influenza

scholarly journals The Usage of Influenza Vaccine to Prevent Seasonal Influenza during Pandemic COVID-19

2021 ◽  
Vol 8 (2) ◽  
pp. 93
Author(s):  
Yelvi Levani ◽  
Ayu Lidya Paramita
Keyword(s):  
Influenza Virus ◽  
Influenza Vaccine ◽  
Elderly People ◽  
Seasonal Influenza ◽  
Morbidity And Mortality ◽  
Acute Respiratory Disease ◽  
Seasonal Flu ◽  
Airborne Disease ◽  
Live Attenuated Influenza Virus ◽  
Virus Influenza

Influenza is an acute respiratory disease caused by influenza virus. Influenza can affect million people in every year and causing morbidity. Some of cases can be severe and need hospitalized, especially in elderly people. Influenza is an airborne disease and can spread rapidly. Every seasonal flu can be different because Influenza virus do mutation. Influenza vaccine can reduce morbidity and mortality. There are two types of influenza vaccine; live attenuated influenza virus (LAIV) and inactivated influenza virus (IIV). The newest type of influenza vaccine consists four types of virus (quadrivalent), therefore it gives more protection compared to the older one. Influeza vaccine is still recommended during pandemic COVID-19 because it can prevent co-infection between Influenza and COVID-19. In addition, it can reduce the morbidity and mortality during pandemic COVID-19.

scholarly journals Key Determinants of Cell-Mediated Immune Responses: A Randomized Trial of High Dose Vs. Standard Dose Split-Virus Influenza Vaccine in Older Adults

2021 ◽  
Vol 2 ◽  
Author(s):  
Chris P. Verschoor ◽  
Laura Haynes ◽  
Graham Pawelec ◽  
Mark Loeb ◽  
Melissa K. Andrew ◽  
...  
Keyword(s):  
Older Adults ◽  
Immune Responses ◽  
Influenza Vaccine ◽  
Influenza A ◽  
Standard Dose ◽  
Serum Antibody ◽  
High Dose ◽  
Post Vaccination ◽  
Antibody Titers ◽  
Virus Influenza

Background: Efforts to improve influenza vaccine effectiveness in older adults have resulted in some successes, such as the introduction of high-dose split-virus influenza vaccine (HD-SVV), yet studies of cell-mediated immune responses to these vaccines remain limited. We have shown that granzyme B (GrB) activity in influenza A/H3N2 challenged peripheral blood mononuclear cells (PBMC) correlates with protection against influenza following standard dose vaccination (SD-SVV) in older adults. Further, the interferon-γ (IFNγ) to interleukin-10 (IL-10) ratio can be a correlate of protection.Methods: In a double-blind trial (ClinicalTrials.gov NCT02297542) older adults (≥65 years, n = 582) were randomized to receive SD-SVV or HD-SVV (Fluzone®) from 2014/15 to 2017/18. Young adults (20–40 years, n = 79) received SD-SVV. At 0, 4, 10, and 20 weeks post-vaccination, serum antibody titers, IFNγ, IL-10, and inducible GrB (iGrB) were measured in ex vivo influenza-challenged PBMC. iGrB is defined as the fold change in GrB activity from baseline levels (bGrB) in circulating T cells. Responses of older adults were compared to younger controls, and in older adults, we analyzed effects of age, sex, cytomegalovirus (CMV) serostatus, frailty, and vaccine dose.Results: Prior to vaccination, younger compared to older adults produced significantly higher IFNγ, IL-10, and iGrB levels. Relative to SD-SVV recipients, older HD-SVV recipients exhibited significantly lower IFNγ:IL-10 ratios at 4 weeks post-vaccination. In contrast, IFNγ and iGrB levels were higher in younger SD vs. older SD or HD recipients; only the HD group showed a significant IFNγ response to vaccination compared to the SD groups; all three groups showed a significant iGrB response to vaccination. In a regression analysis, frailty was associated with lower IFNγ levels, whereas female sex and HD-SVV with higher IL-10 levels. Age and SD-SVV were associated with lower iGrB levels. The effect of prior season influenza vaccination was decreased iGrB levels, and increased IFNγ and IL-10 levels, which correlated with influenza A/H3N2 hemagglutination inhibition antibody titers.Conclusion: Overall, HD-SVV amplified the IL-10 response consistent with enhanced antibody responses, with little effect on the iGrB response relative to SD-SVV in either younger or older adults. These results suggest that enhanced protection with HD-SVV is largely antibody-mediated.Clinical Trial Registration: ClinicalTrials.gov (NCT02297542).

Direct UV Spectrophotometry and HPLC Determination of Triton X-100 in Split Virus Influenza Vaccine

2016 ◽  
Vol 99 (2) ◽  
pp. 396-400 ◽  
Author(s):  
Bojana Pavlović ◽  
Nataša Cvijetić ◽  
Luka Dragačević ◽  
Branka Ivković ◽  
Zorica Vujić ◽  
...  
Keyword(s):  
Influenza Vaccine ◽  
Hplc Method ◽  
Uv Spectrophotometry ◽  
Chromatographic System ◽  
Virus Particles ◽  
Triton X ◽  
Sensitive Method ◽  
Detection And Quantification ◽  
Virus Influenza

Abstract One of the most commonly used surfactants in the production of split virus influenza vaccine is nonionic surfactant Triton X-100. After splitting of the virus is accomplished, Triton X-100 is removed from the vaccine by subsequent production steps. Because of toxicity of Triton X-100, which remains in the vaccine in residual amounts, a sufficiently sensitive method for its detection and quantification needs to be defined. Two methods for determination of Triton X-100 residuals were developed: the UV-spectrophotometry and HPLC methods. For both methods, preparation of vaccine samples and removal of proteins and virus particles were crucial: samples were treated with methanol (1:1) and then centrifuged at 25 000 × g for 30 min. After such treatment, the majority of vaccine components that interfered in the UV region were removed, and diluted samples could be directly measured. The chromatographic system included C18 column, step methanol gradient, and detection at 225 nm with a single peak of Triton X-100 at 12.6 min. Both methods were validated and gave satisfactory results for accuracy, precision, specificity, linearity, and robustness. LOQ was slightly lower for the HPLC method. Hence, it was shown that both methods are suitable for analysis of residual amounts of Triton X-100, with the advantages of the UV method being its simplicity and availability in most laboratories.

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