Bacillus Calmette-Guérin (BCG) vaccine

Relevance: Prelims: Health

Why in news?

• The question that weather the BCG vaccine also protect against the novel coronavirus (SARS-CoV2)? That is a question the scientific community worldwide has been discussing over the past few days.

About:

• The Bacillus Calmette-Guérin (BCG) vaccine is a live attenuated strain derived from an isolate of Mycobacterium Bovis and has been used widely across the world as a vaccine for tuberculosis.

• A live attenuated vaccine means that it uses a pathogen whose potency as a disease producer has been artificially disabled, but whose essential identifying characters, which help the body mount an immune response to it, have been left unchanged.

• One study claims a link between low COVID-19 spread and wide BCG coverage. However, other studies have dismissed the claim.

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