View clinical trials related to Influenza.
Filter by:The goal of this prospective, digital randomized controlled trial is to evaluate the effectiveness of a predictive ILI detection algorithm and associated alerts during influenza season for adults living in the contigent United States. The main study objectives are to assess the effectiveness of predictive ILI detection algorithm and associated alerts on protective behaviors related to ILI and assess the accuracy of a predictive ILI detection algorithm using participant self-reported ILI symptoms and diagnosis.
Routine annual influenza vaccination is recommended for all persons aged ≥6 months who do not have contraindications. For those aged 6 months through 8 years who have previously received ≥2 total doses of trivalent or quadrivalent influenza vaccine ≥4 weeks apart, they require only 1 dose of influenza vaccine. For those who have not previously received ≥2 doses of trivalent or quadrivalent influenza vaccine, they require 2 dose of influenza vaccine. but the evidence on how to select vaccine doses for quadrivalent influenza vaccine is limited in China. The study is a prospective, open-label comparison of the immunogenicity and reactogenicity of 1 versus 2 doses of an inactivated quadrivalent influenza vaccine in subjects of 3-8 years old with different history of influenza vaccination.
Aging is associated with immunosenescence and impaired host defense mechanisms, contributing to influenza-related morbidity and mortality. Preliminary data demonstrate that the platelet transcriptome is markedly different between healthy subjects and influenza patients. Interferon-induced transmembrane proteins (IFITM) family members are among the transcripts significantly increased in platelets during influenza and expression of IFITM-3 is impaired in elderly subjects, a pattern associated with increased mortality. This study will build on these data and investigate if aging influences the expression of platelet IFITM family members in patients with influenza and sepsis. This study will prospectively determine if aging alters the induction of (IFITMs) in platelets from hospitalized influenza and sepsis patients. The study will also determine if diminished expression of IFITM family members correlates with an increased risk of adverse outcomes in older influenza and sepsis patients.
This study evaluates the safety of freeze-dried live attenuated influenza vaccine for intranasal administration in chinese adults aged 3 years and older.80 subjects will be divided into 2 groups, including 18 years and older and 3-17 years old. Subjects in each groups will randomly receive one dose of influenza vaccine or placebo in a 3:1 ratio.
Background: Most people infected with the influenza virus have mild symptoms. But some get very sick and even die. Antibodies in the part of the blood called plasma fight germs like influenza. Researchers want to see if plasma with high levels of antibodies helps more than plasma with low levels when transfused into people with influenza. They have plasma from people with high levels of antibodies from being infected with influenza or getting the influenza vaccine. They also have plasma with low or no antibodies. Objective: To see if plasma with high levels of antibodies works better than plasma with low levels to treat influenza. Eligibility: People ages 2 weeks and older who are hospitalized for symptoms of influenza Design: Participants will be screened with medical history and blood and urine tests. They may have a nasal wash test for influenza. For this, they get a saline rinse in one nostril. A plastic tube inserted in the nostril collects fluid. The study lasts 28 days. Participants will get routine influenza care. This includes standard drugs and possible chest x-rays. On Day 1, participants will have: Physical exam Blood tests Throat swab 2 doses of plasma with high antibodies or low antibodies by IV catheter (tube) in a vein. On Days 3 and 7, participants will return to the clinic, if no longer hospitalized, for 1-hour visits. The visits include: Medical exam Blood tests Throat swab On Days 2, 14, and 28, participants will be evaluated either at the clinic or by phone. They will talk about their symptoms.
The goal of this research study is to improve rates of appropriate influenza and pneumococcal vaccination among adults who receive care at a large multi-specialty group practice in central Massachusetts. The investigators plan to conduct a non-blinded randomized controlled trial during flu season 2014-2015 (Cycle 1). A total of 20,000 e-portal users and 10,000 non e-portal users who are identified in the Reliant Medical Group (RMG) Electronic Health Record (EHR) as not being up to date on their influenza vaccines will be randomized. E-portal users will be randomized to receive: - Arm 1: E-portal message with Interactive Voice Recognition (IVR) call - Arm 2: E-portal message with no IVR call - Arm 3: No e-portal message with IVR call OR - Arm 4: No e-portal message with no IVR call (Control, e-portal users) Non e-portal users will be randomized to receive either: - Arm 5: IVR call OR - Arm 6: no IVR call (Control, non e-portal users)
The purpose of the study is to assess the number of severe, laboratory-confirmed influenza in children hospitalized to paediatric intensive care units. Furthermore, the proportion of these children from all children hospitalized to paediatric intensive care units with acute respiratory infections will be established.
Each winter, viruses belonging to two kinds of influenza A ("A/H1N1" & "A/H3N2") and two kinds of influenza B ("B/Yamagata" & "B/Victoria") can cause illness. The yearly influenza vaccine is designed to protect against both kinds of influenza A but only one or the other kind of influenza B. Current recommendations in Canada are that if an eligible child less than nine years of age has received two doses of influenza vaccine before, then that child only requires a single dose of influenza vaccine in subsequent years of immunization. In a previous study conducted in early 2010 we measured the antibody response to influenza B in children who had previously received two doses of a B/Yamagata kind of virus contained in the 2008-09 influenza vaccine and just one dose of the B/Victoria kind of virus contained in the 2009-10 recommended vaccine. The purpose of this follow-up study is to see if the protection (antibodies in the blood) provided against the influenza B/Victoria kind of virus that was in the 2009-10 vaccine can be improved with another (second) dose of the same B/Victoria kind of virus included in the 2010-11 vaccine. Since influenza B is an illness especially of children, understanding how to best protect children against both kinds of influenza B is important.
In the spring of 2009, a recently emerged novel influenza A (H1N1) virus was first identified in Mexico and USA and it has continued to spread globally. The rapid global spread of a novel influenza A (H1N1) 2009 virus prompted the World Health Organization (WHO), on 11 June 2009, to declare the first influenza pandemic in 41 years. In Taiwan, a clinical study to assess the immunogenicity and safety of Influenza Virus Vaccine, AdimFlu-S (A/H1N1), in healthy volunteers has already been completed. In the previous study, we found that a single 15 mcg HA dose of the AdimFlu-S (A/H1N1) vaccine induces a protective immune response in most adults, including those > 60 years of age (>70%). Our current study aims to follow-up subjects who received Influenza Virus Vaccine, AdimFlu-S (A/H1N1), six months ago. These subjects' serum samples were tested for anti-hemagglutinin (HA) antibodies by hemagglutination inhibition (HAI). The seroconversion is defined as the post-vaccination serum HAI titer had at least 1:40 for subjects who had seronegative pre-vaccination or a four-fold or greater increase in HAI titers for subjects who had seropositive pre-vaccination serum. The immunogenicity of Influenza Virus Vaccine, AdimFlu-S (A/H1N1), in adults after half a year will be analyzed and discussed among the subjects with serum HAI titer had at least 1:40 at least 3 weeks after AdimFlu-S (A/H1N1) injection.
Each winter, viruses belonging to two kinds of influenza A ("A/H1N1" & "A/H3N2") and two kinds of influenza B ("B/Yamagata" & "B/Victoria") can cause illness. The yearly influenza vaccine is designed to protect against both kinds of influenza A but only one or the other kind of influenza B. The vaccine is changed from year to year, meaning it may include one kind of B virus one year and the other kind another year. But because influenza is so hard to predict, sometimes the kind of B virus chosen for the vaccine may not match the kind that is causing illness. The National Advisory Committee on Immunization recommends that all infants and toddlers receive influenza vaccine to protect against their high rates of hospitalization. Infants/toddlers receiving influenza vaccine for the first time must get two doses (prime plus boost) to have a good antibody response. If they have ever before received a single dose of influenza vaccine, then they are recommended to receive only one dose each year afterwards. But we don't know how well previous doses of one kind of influenza B set the stage for good antibody response to a single dose of the other kind of influenza B. This study will try to answer that question in a group of infants/toddlers who last year received two doses of one kind of B virus ("Yamagata"), as part of another study. This year, we will give them a single dose of influenza vaccine that now contains the other kind of B virus ("Victoria") and see how much antibody they make to both kinds. About half these children received a higher amount of influenza vaccine in the previous year's study, so we will also compare their antibody levels on that basis. Since influenza B is an illness especially of children, understanding how to best protect infants/toddlers against both kinds of influenza B is important. This study will help us know if we need to design a new vaccine that not only includes both kinds of influenza A, but also both kinds of influenza B.