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influenza vaccine (Agriflu / eTIV_a / Begripal)

✓ Approved

Novartis AG · Vaccine · Vaccine

What is influenza vaccine?

influenza vaccine is a vaccine developed by Novartis AG. It is approved for therapeutic indications via injectable (others) or intramuscular (im) injection.

Drug Profile

Brand NamesAgriflu, eTIV_a, Begripal
CompanyNovartis AG
Drug ClassVaccine
RouteInjectable (Others), Intramuscular (IM) Injection
StatusApproved
Sources: ClinicalTrials.gov, Novartis AG

Related Research Articles

PubMedFrontiers in veterinary science2026-07-17

A trivalent inactivated PDCoV-PEDV-TGEV vaccine confers protective efficacy in piglets coinfected with porcine rotavirus.

Zha Yinhe Y, Yu Xiaoyu X, Duan Yu Y, Zhang Wentao W et al.

Porcine epidemic diarrhea virus (PEDV), porcine deltacoronavirus (PDCoV), and transmissible gastroenteritis virus (TGEV) are the primary enteric coronaviruses responsible for viral diarrhea in piglets. These pathogens frequently co-circulate with porcine rotavirus (PoRV) under field conditions, leading to increased disease severity and complicating prevention efforts. Although multivalent vaccines targeting these three coronaviruses have been developed, their protective efficacy in the presence of PoRV coinfection remains largely unknown. Based on our previously developed trivalent inactivated PDCoV-PEDV-TGEV vaccine, the present study evaluated its immunoprotective efficacy in piglets naturally infected with PoRV. The results showed that, despite the background of persistent PoRV infection, the trivalent vaccine induced detectable neutralizing antibodies against PEDV, PDCoV, and TGEV (titers≥1:64). Furthermore, vaccination significantly reduced fecal viral shedding after challenge, shortened the duration of diarrhea, and alleviated intestinal pathological damage. Immunofluorescence assays confirmed that antigen deposition of the target coronaviruses in the intestines of vaccinated piglets was markedly reduced. However, vaccinated piglets continued to shed PoRV, indicating that the vaccine did not confer sterilizing immunity but rather reduced clinical severity. This study provides the experimental evidence that the trivalent inactivated vaccine confers effective protection against the three major porcine enteric coronaviruses even under complex clinical conditions involving PoRV coinfection. These findings offer important insights for developing immunization strategies to control multi-pathogen infections in swine production.

PMID 42465716
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PubMedmedRxiv : the preprint server for health sciences2026-07-17

Post-vaccination expansion of extrafollicular Th10 and regulatory Tfr cells distinguishes strong from weak influenza vaccine responses in older adults.

Mahajan Avinash S AS, Ravichandran Sathyabaarathi S, Marches Radu R, Yazici Yilmaz Yucehan YY et al.

Despite the superior efficacy of high-dose influenza vaccines, over one-third of older adults fail to respond. Yet, the mechanisms underlying this impaired vaccine responsiveness remain poorly understood. Here, we performed longitudinal profiling of older adults (n=60) receiving high-dose influenza vaccination to identify immune programs associated with vaccine responsiveness. Strong responders exhibited a primed baseline immune state characterized by elevated plasma cytokines and chemokines, followed by enhanced IFN-γ responses and coordinated transcriptional and epigenetic activation of cDC2 cells at day 1. By day 7, CD4⁺ T-cell trajectories diverged: strong responders preferentially expanded influenza-specific activated cTfh1 ( CXCR5 + CXCR3 + ICOS + CD38 + ) and influenza-specific Th10 ( CXCR5⁻ CXCR3 + PD1 + IL10⁺ ) cells, whereas weak responders expanded regulatory cTfr ( CXCR5⁺ FOXP3⁺ ) cells. Th10 expansion correlated with plasmablast and antibody responses and was independently validated in a larger influenza vaccination cohort, including younger adults. Functionally, Th10 cells promoted memory B-cell differentiation into plasmablasts and production of influenza-specific IgGs. TCR analyses revealed minimal clonal overlap between Th10 and cTfh1 cells. Together, these findings identify divergent helper and regulatory CD4⁺ T cell programs associated with vaccine responsiveness and establish Th10 cells as a previously unrecognized component of vaccine-induced humoral immunity.

PMID 42465941
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PubMedVirologica Sinica2026-07-17

Pygenic Acid A, a Small-Molecule PD-1/SHP-2 Inhibitor, Enhances Efficacy of Therapeutic Melanoma Vaccines and Prophylactic Influenza Vaccines.

Yan Yan Y, Li Yitong Y, Mei Wenyi W, Li Yixin Y et al.

Overcoming immunosuppressive tumor microenvironments remains a critical challenge in advanced vaccine development. Here, we evaluated Pygenic acid A (PA), an intracellular small-molecule inhibitor targeting the PD-1/SHP-2 axis, as a novel vaccine adjuvant. The adjuvant efficacy of PA was systematically assessed in two murine models: a therapeutic B16-F10 melanoma lung metastasis model and a prophylactic lethal H1N1 influenza virus challenge model. In the melanoma metastasis model, PA potentiated the anti-tumor effect of the mTRP2 vaccine, markedly inhibiting pulmonary metastatic lesions and prolonging the survival of tumor-bearing mice. Mechanistically, PA robustly boosted the intratumoral infiltration of functional T cells, thereby reversing local tumor immunosuppression. In the influenza vaccination model, consistent immunostimulatory effects were observed: the PA-adjuvanted hemagglutinin (HA) vaccine effectively elicited broad-spectrum cross-neutralizing antibody responses and provided complete protection against lethal heterologous influenza virus challenge. Further mechanistic investigations demonstrated that PA specifically promoted the differentiation of T follicular helper (Tfh) cells and the expansion of germinal center (GC) B cells in draining lymph nodes, while triggering a robust Th1-type cellular immune response dominated by IFN-γ secretion. Furthermore, in vivo safety assessments verified that PA intervention induced no obvious systemic inflammation, hematological abnormalities, or visceral organ injury, indicating a favorable safety profile. Collectively, these results demonstrate that PA serves as a potent and safe intracellular checkpoint-targeting adjuvant capable of potentiating both cellular immunity and cross-protective humoral immunity, holding great translational promise for the development of advanced cancer vaccines and broad-spectrum influenza vaccines.

PMID 42462877
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PubMedThe Journal of infectious diseases2026-07-17

Influenza Antibody Levels Associated with Laboratory-Confirmed Influenza in a Test-Negative Study Design, US Flu VE Network, November 2018-May 2019.

Flannery Brendan B, Chung Jessie R JR, Holiday Crystal C, Jefferson Stacie S et al.

We assessed associations between antibody concentrations within 7 days of symptom onset and testing positive for influenza virus infection among outpatients enrolled in a test-negative study. From November 2018─May 2019, study sites in five states obtained serum and respiratory specimens from outpatients aged ≥18 years presenting with acute respiratory illness. Respiratory specimens were tested for influenza virus, and viral clades were identified by genomic sequencing. We measured influenza antibody titers against vaccine and circulating viruses by hemagglutination inhibition (HI), microneutralization (MN) and neuraminidase inhibition (NAI) assays. Reduction in odds of influenza-associated illness at increasing HI, MN and NAI antibody titers was estimated using logistic regression adjusting for influenza vaccination status and time since beginning of influenza season. Among 175 patients with confirmed influenza virus infection, including 112 with influenza A(H1N1)pdm09 and 63 with A(H3N2) (44 clade 3C.3a), and 130 test-negative control patients, higher HI, MN and NAI antibody titers against circulating influenza viruses were associated with lower odds of confirmed influenza. Odds of A(H1N1)pdm09 infection were 44% and 54% lower for each two-fold increase in A(H1N1)pdm09 HI or NAI titer, respectively. Odds of A(H3N2) infection were 49% and 28% lower, respectively, for each two-fold increase in MN or NAI titer against circulating A(H3N2) virus clade. NAI titers were independently associated with lower odds of influenza A(H1N1)pdm09 and A(H3N2) after controlling for HI titer. Higher influenza antibody titers against circulating viruses were associated with lower likelihood of influenza virus infection among adult patients with acute respiratory illness.

PMID 42463137
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PubMedJournal of voice : official journal of the Voice Foundation2026-07-17

Characterizing the Effects of Disorder Type, Vowel, and Pitch on the Temporal Variability of Electroglottographic Signals in Dysphonic Voices.

He Lei L, Luo Huiping H, Shu Min M, Brockmann-Bauser Meike M

Electroglottographic (EGG) signals are inherently complex in the time domain, yet conventional measurement techniques frequently fail to capture their temporal variability. This study introduces curvEGG, a novel approach designed to quantify the time-dependent complexity of EGG signals based on instantaneous curvedness. As a proof of concept, curvEGG is applied to characterize glottal source complexity across variations in vowel, pitch, and voice disorder type. Parameter development and exploratory retrospective case-control study. CurvEGG was derived by computing the integrated squared second derivative of a preconditioned EGG segment, representing its total time-dependent variation, and normalizing this value against that of an ideal EGG archetype with a matched fundamental frequency. EGG recordings from the Saarbrücken Voice Database were analyzed for 30 women (mean age = 33 years, SD = 9.3), including ten vocally healthy, ten with hyperfunctional dysphonia, and ten with secondary hyperfunctional dysphonia accompanied by vocal fold pathology. Sustained vowels [i], [u], and [a] produced at normal-, low-, and high-pitch conditions were examined. Linear mixed models assessed effects of pathology and vowel in each pitch condition; associations with extremely high curvEGG values were evaluated using Fisher's exact tests of contingency tables. Low-pitched phonation most effectively characterized healthy and dysphonic voices, with curvEGG increasing progressively from the healthy to the secondary hyperfunctional dysphonia group. Normal- and high-pitch conditions revealed complex interactions between vowel type and pathology, with generally higher EGG complexity for [a] compared with [i] and [u]. Extremely high curvEGG values were typically associated with pathological voices at low-pitch (P < 0.0001). Based on the present findings using curvEGG, it was demonstrated that temporal variations in the EGG offer encouraging signs in characterizing dysphonia in the time domain, particularly under low-pitch conditions. A larger clinical study of voice-disordered adults is needed to confirm the diagnostic potential of curvEGG and its further ameliorations.

PMID 42463358
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PubMedClinical infectious diseases : an official publication of the Infectious Diseases Society of America2026-07-17

Artificial Intelligence Across the Vaccine Clinical Trial Lifecycle: Evidence, Readiness, and Guardrails.

Idriss Jad J, Kalash Suha S, Faraj Jana Abu JA, Nolan Lauren L et al.

Artificial intelligence (AI) is increasingly being used to support clinical research, but its value in vaccine clinical trials requires careful evidence-based assessment. Vaccine trials pose distinctive challenges, including high safety expectations in healthy participants, evolving pathogen exposure and baseline immunity, incomplete correlates of protection, applicability of findings to intended-use populations, and intense public scrutiny. We conducted a structured, vaccine-focused narrative review of AI applications across the vaccine trial lifecycle, supplemented by targeted clinical trial and vaccine pharmacovigilance studies with directly transferable methods. In the combined evidence base, evidence is strongest for operational uses, particularly recruitment, eligibility screening, trial matching, and risk-based monitoring. Applications to immune-response interpretation, correlates of protection, and vaccine safety surveillance are promising but remain less prospectively validated. Responsible adoption should be guided by intended tool use, evidence of strength, data governance, regulatory expectations, and preservation of human scientific and safety judgment.

PMID 42464875
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