3. Presence of acute infection (e.g. malaria, helminthiasis, acute hepatitis, acute pneumonia, septicaemia, meningitis). Children may be admitted after recovery of an acute infection. Children with chronic lung disease, including recurrent respiratory infections, are eligible. Children with tuberculosis (TB) will not be enrolled while on the intensive phase of anti-tuberculosis therapy, but should be re-evaluated after the intensive phase and a decision made then about starting ART (see 4 below)