The people at risk of developing TB are those with weakened immune systems, so those who are HIV-positive, diabetics, malnourished people, children under the age of five, and the elderly. If children under the age of five receive this BCG vaccination early in life, they tend not to develop the serious forms of TB such as tubercular meningitis.
Si les enfants de moins de cinq ans reçoivent tôt dans leur vie le vaccin BCG, ils risqueront moins de contracter des formes graves de tuberculose, comme la méningite tuberculeuse.