Active clinical trials for "Influenza, Human"

The purpose of this study is to investigate the responses to licensed trivalent, inactivated influenza vaccine (TIV) delivered by different routes: intramuscular (IM) and intradermal (ID) and to the live, attenuated influenza vaccine (LAIV) administered intranasally -- all given to generally healthy male and female adult volunteers.

A randomized, controlled clinical trial to assess whether text messaging to an outpatient obstetric population can improve maternal influenza vaccine uptake.

Vaccination is the most effective way of preventing infectious diseases. Despite the success of vaccines in general, vaccines induce diminished antibody responses and lower protection in the elderly in particular. This could be explained by a defect in the early responses of an ageing immune system. A better understanding of the basic immunological mechanisms that mediate vaccine efficacy is incomplete. Such information is critical and could greatly decrease both the cost and the time to new vaccine development particularly for the geriatric population. In this trial, the investigators will study the immunologic differences of an FDA approved licensed influenza vaccine between a younger and an older group. Twenty two healthy volunteers between the age of 25-40 and forty four healthy volunteers above the age of 65 will be enrolled in the study. Each participant in the study will be given one flu shot. Blood work will be obtained prior to vaccination, one day, three days, seven days, fourteen days, as well as one month and six months after vaccination. Throughout the duration of the study, the participants will be monitored for safety.

Despite U.S. guidelines for influenza vaccination of all children starting at age 6 months, only about half of children are vaccinated annually, leading to substantial influenza disease in children and spread of disease to adults. A major barrier is that families are not reminded about the need for their children to receive influenza vaccination. The investigators will evaluate the impact of patient reminder/recall performed by state immunization information systems to improve influenza vaccination rates by using three clinical trials in two states. The investigators will assess effectiveness and cost-effectiveness of phone reminder/recall on improving influenza vaccination rates. The investigators will disseminate the state immunization information system-based reminder/recall system to all states for use for seasonal and pandemic influenza vaccinations with the goal of lowering influenza morbidity.

Eligible research subjects will be randomized to receive either FluMist or inactivated influenza vaccine then stratified by age and necessity to receive either one or two immunizations. Subjects requiring one immunization will be immunized at Day 0. Subjects requiring two immunizations will be immunized at Day 0 and Day 28. Subjects will be observed for 30 minutes following vaccination and given a diary card to record symptoms after each vaccination.

The objective of this study was to assess the feasibility and effectiveness of using a statewide immunization information system (IIS) to send seasonal influenza vaccine reminders from Local Health Departments (LHDs), targeting children with high-risk conditions.

Nudge is a set of methods aimed at helping people adopt a behavior by a gentle prompt, conscious or not. Classically, Nudges rely on heuristics and cognitive biases. These methods have been studied for years in social psychology and are receiving renewed attention since the awarding of the Nobel Prize in economics to Richard Thaler for his work on the application of Nudge to the economy. Health professionals are very inadequately vaccinated (25 to 45% of the population). Some studies have shown that a Nudge based on intent implementation can significantly increase vaccination coverage. However, few studies evaluate the acceptability of Nudge or its application to health professionals. The investigators sought to apply a Nudge based on availability heuristics to health professionals, in order to evaluate its effectiveness and terms of behavior adoption (influenza vaccination) and its acceptability. The investigator's hypothesis is that Nudging is both effective and acceptable and that people found nudging more acceptable if they have been exposed to a nudge.

This study is designed to note whether a larger safety study using quadrivalent live attenuated influenza vaccine (LAIV4) versus quadrivalent inactivated influenza vaccine (IIV4)(FLUARIX®), would be feasible in children with persistent asthma. Half of the patients in this study will receive the FLUARIX® influenza vaccine, while the other half will receive a cell cultured quadrivalent inactivated influenza vaccine (ccIIV4)(Flucelvax®) being used as a surrogate for LAIV4.

This study will investigate markers, mechanisms and define general predictors for immunological health by comparing influenza vaccine responses in monozygotic and dizygotic twins.

In this exploratory study, investigators will be looking at immune response differences between age groups and between the two different vaccines given to identical twins and vaccine-naive young adults.