Box 1. Triaging tool for severe illness used in Tamil Nadu Kasanoi Erappila Thittam^ (TN-KET), India [19,20]*.

If at least one of the following is present, then the person with TB is ‘high risk of severe illness’ (requires referral for comprehensive assessment and inpatient care) Body mass index (BMI) less than or equal to (≤) 14.0 kg/m2# BMI less than or equal to (≤) 16.0 kg/m2 with leg swelling# Respiratory rate more than (>) 24 per minute## Oxygen saturation less than (<) 94%## Not able to stand without support (standing with support/squatting/sitting/bed ridden)

TB-tuberculosis; ^means TB death-free project in Tamil language; *Reprinted from Shewade HD et al [20] under a CC BY licence, with permission from MDPI, Copyright MDPI 2021, tool adapted from Bhargava A et al [19]; ^#very severe undernutrition indicators; ^##respiratory insufficiency indicators.