View clinical trials related to Vaccines.
Filter by:This prospective, single-centre, open-label, randomized study aims to determine whether coordinated care in administering protective vaccinations (against Respiratory Syncytial Virus (RSV) and influenza) impacts the prognosis of patients with chronic heart failure. The main question it aims to answer is: • Does coordinated care through vaccinations improve the prognosis of patients with chronic heart failure?
The purpose of this study is to learn about the safety and effects of the study vaccine for the possible prevention of influenza. Influenza is a disease that can spread easily from one person to another and cause body aches, fever, cough, and other symptoms. The study vaccine is called Pandemic Influenza modRNA (pdmFlu) Vaccine. This study is seeking for participants who are: - between the age of 18 to 49 years old. - willing and able to follow with all scheduled visits, treatment plan, laboratory tests, lifestyle changes, and other study procedures. - healthy as confirmed by medical history, physical examinations, and the study doctor. - capable of signing informed consent. Participants will receive either: - the pdmFlu Vaccine, - a licensed Influenza Vaccine (QIV) - a placebo. A placebo does not have any medicine in it but looks just like the study medicine. Participants will not know which vaccine they receive. Participants will receive the study vaccines as a single shot in the arm at day 1 and at day 21. The study will compare participant experiences to help understand if the pdmFlu Vaccine is safe and effective. Participants will take part in this study for up to 8 months. During this time, the participants will receive the study vaccine and take part in follow-up visits.
The immunogenicity and safety of AdCLD-CoV19-1 OMI (5.0x10^10 VP (0.5 mL)/dose/Vial) administered as a booster in healthy adults aged 19 years old and above will be evaluated. Outcome assessment will be performed in comparison with Comirnaty Bivalent.
The clinical trial studies the human pathogen of SARS-CoV-2, with a specificity in the circulating Spike 2 protein in the human system. The clinical trial hypothesizes that SARS-CoV-2 human pathogen arises from immune attacks, underlying the severe physiological symptoms that can be lethal. It further hypothesizes that the vaccines do not deal with the Spike 2 protein that causes the immune attacks.
Phase 2 clinical trial in adults previously vaccinated against SARS-CoV-2 in Chile with an initial schedule of two doses of CoronaVac® plus two booster doses with different vaccines. Subjects will randomly receive a third booster dose with Omicron, trivalent, or CoronaVac® vaccine. The humoral immunogenicity against COVID-19 will be compared in subjects that received the Omicron or the Trivalent vaccines with subjects that received CoronaVac® to determine the superiority of the two candidate vaccines versus CoronaVac®. Subjects will be followed for 6 months after the booster dose administration.
This is a prospective randomized clinical trial evaluating how behaviorally-informed outreach text messages affect the take-up of bivalent COVID-19 booster. The investigators will test the impact of sending text reminders as well as the importance of elevating vaccination intentions, facilitating action, and their combination.
This study investigates different ways to elevate intentions to get the COVID-19 booster via text-based reminders, including providing information about the booster and leveraging the consistency principle. The proposed randomized controlled trial will examine the impact of these reminders on booster uptake.
This randomized controlled trial investigates whether text-based reminders can increase the bivalent COVID-19 booster uptake and whether text-based reminders that mention the opportunity to bundle the COVID-19 booster with the flu shot within the same appointment can increase take-up of both the COVID-19 booster and the flu vaccine.
The safety and immunogenicity of AdCLD-CoV19-1 OMI (5.0x10^10 VP (0.5 mL)/dose/Vial) administered as a booster in healthy adults aged 19 years old and above will be evaluated.
The immunogenicity and safety profiles of AdCLD-CoV19-1 (5.0×10^10 VP/dose) will be assessed for 1-dose or 2-dose regimen in SARS-CoV-2 seronegative healthy adults.