Prevention Of Influenza In Adults Research Articles

High-Dose Inactivated Influenza Vaccine Quadrivalent for Older Adults.

To review the efficacy and safety of the high-dose inactivated influenza vaccine quadrivalent (HD-IIV4) in the prevention of influenza in older adults. A literature search was performed using PubMed and Google Scholar with the search terms high-dose, influenza vaccine, and quadrivalent. Other resources included the Centers for Disease Control and Prevention (CDC), the prescribing information, and the manufacturer's website. All relevant English-language articles of studies assessing the efficacy and safety of HD-IIV4 were included. HD-IIV4 is licensed by the Food and Drug Administration for the prevention of influenza in adults aged 65 years and older. The safety and immunogenicity of HD-IIV4 was demonstrated in a phase 3 trial, and the efficacy of the trivalent formulation (HD-IIV3) was demonstrated in a phase 3b-4 trial. HD-IIV4 carries a warning regarding the occurrence of Guillain-Barré syndrome. Adverse reactions, including injection-site pain and myalgia, were reported more frequently with HD-IIV4 than with HD-IIV3. Although the CDC recommends any age-appropriate influenza vaccine for adults aged 65 years and older, HD-IIV4 was associated with improved immunogenicity against the added B strain and HD-IIV3 provided better protection against influenza than the standard-dose vaccine. Other influenza vaccines have weaker evidence of efficacy in older adults. Therefore, HDIIV4 should be recommended as the vaccine of choice in adults aged 65 years and older. HD-IIV4 has proven immunogenic, safe, and effective in preventing influenza in older adults and should be recommended as the vaccine of choice in this patient population.

Correction to: Cell-Based Quadrivalent Inactivated Influenza Virus Vaccine (Flucelvax® Tetra/Flucelvax Quadrivalent®): A Review in the Prevention of Influenza.

The article Cell-Based Quadrivalent Inactivated Influenza Virus Vaccine.

Cell-Based Quadrivalent Inactivated Influenza Virus Vaccine (Flucelvax® Tetra/Flucelvax Quadrivalent®): A Review in the Prevention of Influenza.

Manufacturing influenza virus vaccines using a mammalian cell line rather than embryonated chicken eggs may carry certain advantages. A quadrivalent inactivated influenza virus vaccine produced using the Madin Darby canine kidney cell line has been approved in the EU (Flucelvax® Tetra) and USA (Flucelvax Quadrivalent®; QIVc hereafter) for the prevention of influenza in adults and children. The clinical development of QIVc has built upon that of a cell-based trivalent influenza virus vaccine (TIVc) manufactured using the same processes; the additional influenza B strain contained in QIVc reduces the risk of the strain in the vaccine not matching that in circulation. Pivotal phase III clinical trials in adult and paediatric participants have demonstrated the immunogenicity of QIVc to be noninferior to that of TIVc formulations against shared strains and superior against the influenza B strain absent from each TIVc formulation. Protective efficacy data for TIVc is considered foundational for QIVc and, in a phase III clinical trial, TIVc was effective in protecting adults against antigenically matched influenza strains. Large real-world studies from the 2017/2018 US influenza season further support the prophylactic effectiveness of QIVc, with possible benefits over egg-based vaccines. QIVc was generally well tolerated in clinical trials. In adult and paediatric QIVc recipients, the most common solicited adverse reactions were injection site pain and headache. Reactogenicity was comparable to that of TIVc; no safety signals unique to QIVc emerged. Through circumventing concerns around egg adaptation, QIVc has the potential to be more effective than currently available egg-based quadrivalent vaccines.Electronic supplementary materialThe online version of this article (10.1007/s40265-019-01176-z) contains supplementary material, which is available to authorized users.

What are the benefits and harms of neuraminidase inhibitors for the prevention of influenza in adults?

What are the benefits and harms of neuraminidase inhibitors for the prevention of influenza in adults?

Safety, efficacy, and immunogenicity of Flublok in the prevention of seasonal influenza in adults.

Flublok is the first recombinant hemagglutinin (HA) vaccine licensed by the US Food and Drugs Administration for the prevention of influenza in adults aged 18 and older. The HA proteins produced in insect cell culture using the baculovirus expression system technology are exact analogues of wild type circulating influenza virus HAs. The universal HA manufacturing process that has been successfully scaled to the 21,000L contributes to rapid delivery of a substantial number of doses. This review discusses the immunogenicity, efficacy and safety data from five pivotal clinical studies used to support licensure of trivalent Flublok for adults 18 years of age and older in the United States. The trial data demonstrate that the higher antigen content in Flublok results in improved immunogenicity. Data further suggest improved efficacy and a slightly lower local reactogenicity compared with standard inactivated influenza vaccine, despite the presence of more antigen (statistically significant). Flublok influenza vaccine can include HAs designed to mimic 'drift' in influenza viruses as the process of predicting antigenic drift advances and, at a minimum, could address late appearing influenza viruses. The implementation of the latter will require support from regulatory authorities.