In election season, crores of households across India are receiving a personalised letter from Prime Minister Narendra Modi as his flagship health insurance plan under the Ayushman Bharat - PM Jan Arogya Yojana (PMJAY), the largest government-funded healthcare programme, touches the 100-day mark. As many as 7.5 crore letters have been printed by the central government at a cost of Rs. 15.75 crore, sources tell NDTV.