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Interventions for Tuberculosis Control and Elimination 2002

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Ulleval<br />

Engl<strong>and</strong><br />

South Africa<br />

Madanapelle<br />

Chingleput<br />

Karonga District<br />

-400 -100 0 30 50 80 90 95<br />

Per cent protection<br />

113<br />

Nurses<br />

Adolescents<br />

Mine workers<br />

Adults<br />

Adults, Pulmonary<br />

Culture confirmed<br />

Adults, first or<br />

second vaccination<br />

Figure 67. Results from prospective studies on the efficacy of BCG vaccination<br />

against tuberculosis in adults. 668,670,763-765,767,768,771-778<br />

The two retrospective studies show a protective effectiveness of 10% 779<br />

<strong>and</strong> close to 60%, 780 respectively (figure 70).<br />

These studies seem to indicate that vaccination of adolescents or adults<br />

is rarely a useful intervention.<br />

Protection (%)<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0<br />

Year of follow-up<br />

Figure 68. Protection from BCG vaccination among British school children during<br />

follow-up. 776

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