evidence: A mapping of skills of the migrant workers who have returned from various states to Bihar shows out of 14 lakh migrants, whose profile has been prepared so far, 8.40 lakh are engaged in different spheres of construction ranging from carpenter to those engaged in construction of road, bridges, dams, painter, mason helpers, among others. [...] Till June, 12, 1510 Shramik Special trains arrived in Bihar bringing 21.24 lakh people travelled to the state. Most of the migrants who returned were kept at block level quarantine centres for 14 days.