TB: BCG vaccine protective for nearly twice as long as previously thought

Previously thought to be effective for 10-15 years, a new case-control study found that if given in early teenage years (12-13), the Bacillus Calmette-Gui(C)rin (BCG) vaccine protected over 50% of UK children against TB for at least 20 years, then waned. The research was led by the London School of Hygiene & Tropical Medicine and ["]

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