Could an Old Vaccine Help Against COVID-19?

The video explores the potential role of the BCG vaccine, traditionally used against tuberculosis, in providing some level of protection against COVID-19. It introduces the concept of trained immunity, which may explain how BCG could offer broader protection against various diseases. The video reviews studies suggesting a correlation between BCG vaccination and lower COVID-19 mortality rates, while acknowledging the limitations and variability in data. It emphasizes the need for further research and clinical trials to determine BCG's effectiveness against COVID-19, especially given its safety profile and historical use.

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