A 28-year-old man from a high TB prevalence country has a positive interferon gamma release assay (IGRA) but a normal chest X-ray and no symptoms. What is the most appropriate management?AReassure; no treatment is requiredBStart treatment for latent TB infection with an isoniazid-containing regimen after exclusion of active diseaseCStart full four-drug TB treatment immediatelyDRepeat IGRA in 3 months and treat only if still positiveEVaccinate with BCGCheck my answer