View clinical trials related to BCG Vaccination Reaction.
Filter by:Type 2 diabetes (T2D) will affect ~650 million adults worldwide by 2040 and about as many will have pre-diabetes. Chronic hyperinsulinemia/insulin resistance precedes T2D development. Studies link insulin resistance with chronic inflammation and oxidative stress. In Guinea-Bissau, a low-income country in West Africa, the T2D incidence is largely unknown and there is an acute lack of diabetes doctors, nurses and other diabetes educators. They hardly have access to insulin, and mortality from T2D complications is high. Previous studies by the Bandim Health Project (www.bandim.org) in the country show that the Bacillus Calmette-Guérin (BCG) vaccine has non-specific effects, well beyond tuberculosis prevention, conferring a general protection against unrelated pathogens. At the same time, studies from the US have also shown that BCG can significantly improve glycemic control in Type-1 diabetes (T1D) patients. Yet, no such studies have been done in T2D or pre-diabetes. The purpose of the present study is to administer BCG to patients with pre-diabetes, in order to reduce hyperinsulinemia/chronic inflammation, a novel strategy to flatten the growing T2D incidence.
In Africa, the mortality from infectious diseases remains high. The investigators have discovered that live vaccines such as the BCG vaccine against tuberculosis and the measles vaccine can strengthen resistance to other infections: they have beneficial "non-specific effects". The investigators have now seen signs that these non-specific effects for children are stronger if their mother has been given the same vaccines. In Africa, BCG vaccine is recommended at birth and measles vaccine at 9 months of age. They are not used beyond childhood. The investigators will randomize 2400 women to BCG vaccine, measles vaccine, or placebo. The investigators will further randomize their children to an extra early measles vaccine or placebo. The investigators will assess which of the resulting six vaccination schedules are best for women's and children's protection against measles, for the child's immune system, and for general health. The project will be the first in the world to investigate the importance of vaccinating women with live vaccines.
TB-reactive immune cells will be tested in a multiparametric flow cytometry to distinguish an immune response for antigens of Mycobacterium spp. in TB disease/latent infection or a reaction after BCG vaccine.
Countries that have not carried out universal mass vaccination against tuberculosis (BCG) have been shown to have higher incidence and death rates due to COVID-19 than countries with mass, long-term BCG immunization programmes. The aim of the study is to answer the following questions: 1. Does BCG vaccination affect the course of COVID-19 (number of cases/deaths/severity of symptoms)? 2. Will the course of COVID-19 be milder among subjects with a negative TB skin test (PPD RT 23 SSI) after an additional dose of BCG than in case of non-vaccinated subjects? 3. Do people with a positive TB skin test have a milder course of COVID-19 infection than people with a negative test result? A multicenter, randomized, partially blinded, placebo-controlled study will be conducted in Rzeszow/Krakow/ Katowice/Warsaw on a group of 1000 volunteers, health care workers according to the following schedule: V 0-1: inclusion/informed consent/interview; V2: administration of TB skin test/anti-SARS-CoV-2 IgG test/serum banking*; V3: TB skin test (TST) interpretation and subjects' division into three groups: (I) positive TST - observation; (II) negative TST- BCG-10 vaccination; (III) negative TST - placebo. Division into groups II and III based on randomisation; V4: serum banking*. Parallel beginning from V3, weekly telephone monitoring participants' health status; In case of COVID-19 symptoms a nasopharyngeal swab to confirm SARS-CoV-2 infection + serum banking*. V5: 3 months after vaccination at the end of the study: history/anti-SARS-CoV-2 IgG test, serum banking*. Statistical analysis - comparison of the course of COVID-19 in groups: (I) with positive TST + observation, (II) with negative TST + BCG, (III) with negative TST + placebo - should demonstrate whether mass BCG vaccination has an impact on the incidence and course of COVID-19. * to measure the level of cytokines involved in cell-mediated immunity process