Africa: Progress on MDR-TB, but not enough

Gains have been made in stopping multidrug-resistant tuberculosis (MDR-TB), a largely undiagnosed killer, but not enough. By 2015 there will be two million new cases, says a new report by the World Health Organisation (WHO). MDR-TB is resistant to first-line TB drugs, such as isoniazid and rifampicin, while extensively drug-resistant TB (XDR-TB) is resistant to these drugs as well as at least half of the mostly commonly used second-line drugs.