COVID-19 was present in over 36 territories in Tamil Nadu as of April 20 , 2020 .
As of 20 April 2020 , 1302 out of 1,520 ( ) cases were from one cluster linked to a Tablighi Jamaat religious congregation event that took place in Delhi.36 of the 38 districts are affected , with Chennai and Coimbatore being the worst-hit districts .
2020 coronavirus pandemic in Tamil Nadu