Could the BCG vaccine from 1921 help save lives?

An interesting report on BBC news this morning about the possibility that the BCG vaccine developed nearly 100 years ago could somehow help with covid-19.

Scientists in the UK have begun testing the BCG vaccine, developed in 1921, to see if it can save lives from Covid-19. It was designed to stop tuberculosis, but there is some evidence it can protect against other infections as well. Around 1,000 people will take part in the trial at the University of Exeter.

BCG (Bacillus Calmette-GuŽrin) vaccine
BCG (Bacillus Calmette-GuŽrin) vaccine for tuberculosis, pictured at the Pasteur Institute in Paris in 1931.

While vaccines are designed to train the immune system to leave lasting protection against one particular infection, the process can cause wider changes in the immune system. Millions in the UK are thought to have had the BCG jab when younger but as the vaccine only lasts about 20 years, they would probably have to be vaccinated again to benefit, if it is proved to help protect against coronavirus. click source

Apparently, similar trials are being conducted in over 20 countries. Interestingly, I found a number of youtube videos dating as far back as March this year, including from the Hindustan Times’ Health Editor, Sanchita Sharma. She informs how BCG vaccine could provide protection against COVID-19. Data suggests that countries without BCG vaccination program have shown higher rate of deaths. BCG vaccine boosts immunity and offers protection against a wide range of respiratory infections. The degree of protection is unknown … Click here for range of Youtube videos on BCG and covid-19

I wonder if this is an example of what was once considered a conspiracy theory being adopted by the mainstream medical establishment as possible scientific fact ?

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