COLOMBO: Numerous studies in many parts of the world have linked the Bacillus Calmette-Guerin (BCG) vaccination, widely used in the developing world with fewer coronavirus disease 2019 (Covid-19) cases. This is good news for countries that have universal BCG vaccination in tropical Asia and Africa.

Many of these countries cannot afford extended lockdowns and curfews since the ensuring economic and supply chain disruption, loss of livelihoods and poverty could kill more people in the long term.

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