Active clinical trials for "Influenza, Human"

Background: - Seasonal influenza is a major health problem whose impact is typically reduced by vaccination. The H1N1 (swine flu) influenza virus is an emerging pathogen that has the potential to cause devastating illness and even death in the coming months. Currently, there are limited data on the cellular and molecular immune responses in adult recipients of either the seasonal or the H1N1 influenza vaccines. Objectives: - To obtain blood and nasal wash samples and perform laboratory studies to characterize the immune response in healthy adult volunteers at baseline and after immunization with the seasonal or H1N1 influenza vaccines. Eligibility: - Adult employees at least 18 years of age of the NIH Clinical Center who are deemed healthy by a brief medical history and physical examination and routine blood testing. Design: Before the start of the influenza season, volunteers will receive either the seasonal influenza vaccine or the H1N1 vaccine when it becomes available. If the H1N1 vaccine is available at the start of the season, volunteers will receive both the seasonal vaccine and the H1N1 vaccine. Blood will be drawn over an 8-week period. Volunteers must not eat anything for 8 hours prior to the blood draw. The sequence of the blood draws is as follows: 2 weeks before vaccination; right before vaccination; and 1, 7, 14, 28, and 60 days after vaccination. Two to four nasal washings will be collected by a nurse before volunteers receive the vaccination(s) and 28 days after the vaccination. Prevaccine and postvaccine blood and nasal wash samples will be compared to determine volunteers immune responses. Research samples will be stored indefinitely and will be used strictly for laboratory experiments.

This study is to study the immune response to the flu vaccine in people 65 years old and older. Only adults 65 years old and older and who are getting their flu vaccine are being asked to join in this study. The investigators plan to enroll approximately 100 people in this study in the 2010-2011 flu season. Vanderbilt is working with the Centers for Disease Control and Prevention on this study. There will be 5 study visits. Up to 4 tablespoons of blood from a vein will be obtained prior to the flu shot. Return visits will be 1, 2, and 4 weeks later,with up to 4 tablespoons of blood drawn again. Patients will be randomized to receive either the standard dose or the high dose flu vaccine. Both flu vaccines are FDA-approved.

In 2009 the World Health Organization (WHO) declared the Influenza A H1N1 (swine 'flu) outbreak the first global pandemic of this century. It is thought to have been responsible for 16,226 deaths globally as of 21st February 2010. The investigators know from previous influenza outbreaks that the number of cases also tends to increase during the winter season of the years after a pandemic. There is concern that last year's pandemic influenza strain will return this winter and it has, therefore, been included in WHO's recommendations for seasonal influenza vaccine combinations. This study will assess the duration of the immune response to the H1N1 influenza vaccines given last year, and how children will respond to this year's seasonal trivalent influenza vaccine (which includes the H1N1 strain). Participating children would receive one dose of a licensed seasonal influenza vaccine and blood tests would be taken before and after vaccination.

The purpose of this study is to determine the pharmacokinetics (PK) of the anti-flu medication, Tamiflu during pregnancy and to determine to what extent pregnancy may affect the currently recommended dosage of this medication.

This is a prospective observational study with recruitment of healthy volunteers from consecutive recipients of H1N1 influenza vaccine at the University Clinic of Respiratory and Allergic Diseases, Golnik, Slovenia. The purpose of this study is to evaluate certain safety aspects of adjuvanted influenza H1N1 vaccines.

Organ transplant patients and staff members at the Transplant Institute have received pandemic H1N1 influenza vaccine (Pandemrix) and specific antibody production was measured by haemagglutination inhibition according to the clinical guidelines and policy, respectively. This study retrospectively assessed the immune response after vaccination.

The purpose of this post-marketing surveillance study is to collect information on efficacy and safety for prophylactic administration of zanamivir in clinical practice in family or persons living with patients with influenza virus infection.

Investigators in the Division of Infectious Diseases are carrying out a study to determine if human immunodeficiency virus (HIV)-seropositive patients receiving the Seasonal Influenza vaccination develop an adequate antibody response. The study group will consist of individuals seen in the Infectious Diseases Clinic who are HIV-seropositive and receive the Seasonal Influenza vaccine.

This observational study will evaluate the safety and effectiveness following administration of adjuvanted Swine Origin A (H1N1) Pandemic Subunit Egg Derived Vaccine through both an ad hoc active monitoring system and a passive surveillance of hospitalization in a large cohort.

This is an observational safety study of a prophylactic use of Flu Egg Derived Adjuvanted Swine Origin A(H1N1) Vaccine in subjects 6 months of age and older. Subjects may receive either 1 or 2 doses: children and elderly will receive 2 doses and adults will receive either 1 or 2 doses.