COVID-19 Clinical Trial
Official title:
COVID-19: BCG As Therapeutic Vaccine, Transmission Limitation, and Immunoglobulin Enhancement
To date, there is no vaccine or treatment with proven efficiency against COVID-19, and the transmissibility of the SARS-CoV-2 virus can be inferred by its identification in the oro-nasopharynx. The bacillus Calmette Guérin (BCG) has the potential for cross-protection against viral infections. This study evaluates the impact of previous (priming effect, from the titer of anti-BCG interferon-gamma) or current BCG exposure (boost with intradermal vaccine) on 1) clinical evolution of COVID-19; 2) elimination of SARS-CoV-2 at different times and disease phenotypes; and 3) seroconversion rate and titration (anti-SARS-CoV-2 IgA, IgM, and IgG).
Prospective, randomized, double-blind, multicentre study with international design collaboration with central clinical and mechanistic outcomes with public health implications both epidemiological and therapeutic in the context of the pandemic of COVID-19, an emerging disease, which quickly disrupted health services including Brazil's Unified Health System (SUS), as well as the entire productive force and economy worldwide. Because it is recent, the basic evidence related to infection, such as incubation period, time of transmissibility, and seroconversion, is little known and the proposal's goals have the potential to redirect the vaccine. Exploring bacillus Calmette Guerin (BCG) that presents significant potential for immune activation, with recognized safety in decades of previous experience and clear potential in the context under analysis, with low cost and available, ensuring wide accessibility, especially in the context of SUS, on which it depends especially the most vulnerable portion of the Brazilian population, notably in the COVID-19 pandemic. Non-specific effects of BCG caused by monocyte epigenetic reprogramming may result in increased production of pro-inflammatory cytokines, conferring innate (trained) immunity and protection against viral infections, including SARS-CoV-2 with the potential to positively impact clinical evolution, viral elimination, and seroconversion of COVID-19 patients. ;
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