View clinical trials related to Vaccine Preventable Disease.
Filter by:Each year in France, more than 6000 new cases of HPV inducted cancers are recorded. The vaccinal cover stays insufficient since less than 30% of the french population is vaccinated. Therefore french studies about vaccine efficacy and especially about the catch-up vaccine (done after 15years old) are needed. HPVAC2 is a prospective, analytic and monocentric study designed to learn the impact of the catch-up HPV vaccination. Women from 25 years old and born after 1984 may be included if they come to the Brest CHU to do their regular cervical smear. At this time, a survey will be given to know their vaccinal status. The aim of the study is to prove the efficacy of the catch up vaccination by analyzing the cervical smears results and by comparing the vaccinated group with the not-vaccinated group.
This study will measure the levels of nasal mucosal Immunoglobulin A (IgA) and blood serum IgA up to one year after COVID vaccination, as well as examining what factors might affect antibody levels in the nose. This will be done through nasal epithelial lining fluid collection and standard venipuncture.
Vaccines often underperform in Africa compared to high-income countries. Why vaccines do not work as well in Africa remains uncertain. Malnutrition likely plays a role. Our study objective is to assess whether iron deficiency anaemia in young women impairs their immune response to viral vaccines, and whether iron treatment improves their response.
Our objective is to determine the effectiveness of varied outreach methods to children age 12-17 years old who are due for a well child check visit and don't have one scheduled in the next 45 days on the outcomes of appointment scheduling, appointment completion, and receipt of the COVID-19 vaccination.
A cluster randomized trial will be conducted prior to widespread vaccine availability to the general public. Community-informed COVID-19 vaccine messages will be disseminated to participants. At baseline, 2 weeks and 4 weeks, the study team will survey participants to assess knowledge and attitudes about COVID-19 vaccines, including intention to be vaccinated.
Background: The virus SARS-CoV-2 has spread rapidly throughout the world. Seniors are at high risk of severe COVID-19 when infected. Bacille Calmette-Guérin (BCG) is a vaccine against tuberculosis, with protective non-specific effects against other infections; significant reductions in morbidity and mortality have been reported, and a plausible immunological mechanism has been identified: "trained innate immunity". The investigators hypothesize that BCG vaccination can reduce the risk of COVID-19 and other infections among senior citizens during the COVID-19 pandemic. Objectives: Primary objective: To reduce senior citizens' risk of acute infection during the COVID-19 pandemic. Secondary objectives: To reduce senior citizens' risk of SARS-CoV-2 infection during the COVID-19 pandemic. To reduce senior citizens' risk of self-reported respiratory illness during the COVID-19 pandemic. Study design: A placebo-controlled randomized trial. Study population: 1900 seniors 65 years of age or above. Intervention: Participants will be randomized 1:1 to intradermal administration of a standard dose of BCG vaccine or placebo (saline). Outcomes: Primary outcome: "Acute infection" identified either by a doctor, antibiotics use, hospitalization, or death due to infection. Secondary outcomes: Verified SARS-CoV-2 infection and self-reported respiratory illness. With an expected incidence of "acute infection" of 20%, the trial can show a 25% risk reduction in the the intervention group versus the placebo group by including a total of 1900 individuals, 950 individuals in each group. Risk for participants and impact: Based on previous experience and randomized controlled trials in adult and elderly individuals, the risks of BCG vaccination are considered low. If BCG can reduce the risk of acute infection in seniors by 25% it has tremendous public health importance, both during the COVID-19 pandemic and overall.