1. World health organisation, factsheets;Tuberculosis,2018
2. What is Tuberculosis, Tuberculosis (TB) - What happens, lung disease and respiratory health, WebMD.
3. What is the difference between latent tb infection and active tb disease? tuberculosis, Minnesota Department of Health [www.health.state.mn/about/index.html].
4. Tuberculosis – Diagnosis and Treatment, Disease and conditions, patient care and health information, Mayo Clinic website.
5. Diagnosis Tuberculosis – Clinical Trials, NHS Choices, Patient care and health information, Mayo Clinic website.