March The first case of coronavirus was confirmed on 7 March in a resident from
Kanchipuram in
Chennai. He had returned from
Oman and started developing symptoms including fever and cough. He was isolated in
Rajiv Gandhi Government General Hospital. Later, on 10 March, he recovered and tested negative. After more than a week without new cases, on 18 March, the second person who had travelled by train from Delhi to Chennai confirmed positive. He did not have any history of foreign travel and was described as a domestic case by the state health minister
C. Vijayabaskar. On 19 March, a 21-year-old student who returned from
Ireland tested positive. On 21 March, a further three were confirmed positive - A Chennai man who had travelled from
New Zealand and two
Thailand nationals in
Erode. They were admitted to IRT Hospital in Perundurai in Erode. More than 300 people who had come in contact with the three patients were quarantined. On 25 March, the first virus-related death in the state was reported after a 54-year-old man in
Madurai died. Five others were infected - four Indonesians and their travel guide from Chennai. The five were in quarantine since 22 March in Salem Medical College. On 28 March, a 21-year-old youth who had just returned from a trip to
Dublin, Ireland was discharged from the hospital. Two new cases - one each in
Kumbakonam and
Katpadi were reported. With this, the total number of confirmed cases had reached 40 in the state. On 29 March, the state reported eight more cases (four each from Coimbatore and Erode), all of which were linked to the two
Thai nationals and their group who had tested positive. The eight included a 10-month-old baby. The total number of confirmed cases reached 50. On 30 March, 17 new cases were reported, highest to date in the state On 31 March, 57 new cases were reported, all with a history of travel predominately to
Delhi, bringing the total to 124. It was the highest single day rise to date. 50 of these cases were from
Namakkal (18),
Tirunelveli (22),
Kanyakumari (4)
Villupuram (3),
Madurai (2) and
Thoothukudi (1), all had travel history to Delhi. Officials had discovered that at least 80 out of 124 confirmed cases (79 per cent) in Tamil Nadu were from one cluster as they are direct or indirect contact of the two Thai nationals who had tested positive for on 21 March. This group had also attended a 3-day
Tablighi Jamaat congregation in
Nizamuddin Markaz mosque,
New Delhi in early March. It was estimated that more than 1,500 people from the state had participated in this event. Officials also confirmed that the 54-year-old patient who had died the previous week had also participated in the gathering. Of 1,500 people who were in the gathering, 1,130 had returned to the state. The government had identified and isolated 515 of the 1,130 people. Following this, the Nizamuddin Markaz emerged as a new virus hotspot.
April On 1 April, the state reported 110 new cases, all attended the Delhi Nizamuddin event. The total became 234. Health Secretary
Beela Rajesh said that 1103 out of 1500 attendees of the event had been traced and isolated. 658 of their samples had been tested of which,190 tested positive. Some of the participants approached officials themselves after government's request. On 2 April, 75 new cases were reported, of which 74 of them attended
Tablighi Jamaat in Delhi. On 3 April, 102 new cases were reported, of which 100 were Delhi event participants. Two others were from Chennai, one with
co-morbid condition and one US-returnee. On 4 April, 74 new cases were reported, of which 69 were Delhi event participants, 4 were contacts of the event participants. One was from Chennai. Two more deaths were reported, a 51 years old male who attended
Tablighi Jamaat at Villupuram and a female at Theni Government hospital. On 5 April, 86 new cases were reported of which 85 are related to Delhi event directly or indirectly. A 71 year old from Ramanathapuram who died on Thursday was tested positive. A 60 year old also died in the same hospital as previous patient. The Health department revealed that 1246 contacts of Tablighi Jamaat participants have been traced and isolated so far. On 6 April, 50 new cases were reported bringing the total cases to 621. 48 of them were returnees of Delhi event. 101 people who attended a COVID-19 victim's burial were home-quarantined in
Ramanathapuram. They were not aware of his condition as the test result returned positive after only two days his burial. On 7 April, 69 new cases were reported, of which 63 were related to Delhi event. On 8 April, 48 new cases were reported bringing total to 738. 42 of those are connected to
Tablighi Jamaat in Delhi. One among the 42 is a Malaysian national. Government had revealed that 1480 attendees of the Delhi event were traced and isolated. 1716 samples from them and their contacts were tested, of which 679 had returned positive. On 9 April, the state reported 96 new cases which brought the total cases to 834. On 10 April, 77 new cases were reported bringing total to 911. 17 cases were clinically recovered, bringing the total recovered to 44. On 11 April, 58 new cases were reported bringing the total to 969 of which, 47 belonged to the Delhi cluster. One more died in IRT Government Hospital at Perundurai in Erode, taking the death toll to 10. The state government revealed that it will decide on the
lockdown extension based on Centre's announcement. On 12 April, 106 new cases were reported bringing the total to 1075. One death was reported, a 45-year-old women died on previous day evening, she was undergoing treatment at a Government Hospital in Chennai. The new infections were found in clusters in Chennai - where four were primary sources and Coimbatore - where two primary sources were identified. According to the health department, of the 106 new cases, 90 contracted the infection from them 16 people who had travel history. On 13 April, 98 new cases were reported bringing the total to 1173. On 14 April, 31 new cases were reported bringing the total to 1204. It was the lowest daily rise since 31 March. A 96-year-old died, making the total of 12 deaths in the state. On 15 April, 38 new cases were reported in the state of which, 34 were related to Delhi cluster. Deaths of two men were reported, a 47-year-old man with
SARI in
Stanley Government hospital, Chennai and a 59-year-old man in a private hospital, making the total of 14 deaths in the state. On 16 April, 25 new cases were reported bringing total to 1267. One death was reported making total of 15 deaths in the state On 17 April, 56 new cases were reported which brought the total to 1323. On 18 April, 49 new cases were reported which brought the total to 1372. 82 patients were discharged making total recovered cases as 365. On 19 April, 105 new cases were reported, third highest daily increase to date. 46 patients were discharged making total recovered cases as 411. On 20 April, 43 new cases reported in Tamil Nadu bringing the total cases in Tamil Nadu to 1,520. The infection rate in the state had dropped from 13% on 1 April 2020 to 3.6%. On 22 April, 33 new cases reported in Tamil Nadu bringing the total cases to 1,629. 27 patients were discharged making total discharged to 662. No death were reported for the day. On 23 April,
Dharmapuri district reported its first COVID-19 case, 54 new cases were reported in the state bringing the total cases to 1,683. 2 more died. 90 patients were discharged making total discharged to 752. On 24 April, 72 new cases were reported, of which 52 cases are from Chennai, Total confirmed cases stood at 1755. 2 more died which took the total fatality to 22. 114 patients were discharged making total discharged to 886. On 28 April, with 121 new reported cases, the total number crossed 2000 to become 2058. Chennai continued to be the worst-hit district with 103 new cases. It had 673 cases, which was of all the cases in Tamil Nadu.
May In May, the
Koyambedu Wholesale Market Complex emerged as a new hotspot in Chennai. By 3 May, 113 infections were traced back to the market. The infected were spread across Chennai, Tiruvallur, Kancheepuram, Cuddalore and Chengalpattu districts as there were loaders who travelled out of Chennai even during the lockdown. Areas around Koyambedu were sealed and the infected vendors' contacts were being traced. Thiruvanmiyur market in South Chennai was also closed after a vegetable vendor who used to visit Koyambedu market tested positive. On 6 May, 771 cases were reported in the state, which took the total to 4829. It was the highest single day rise to date. On 8 May, 600 new cases were reported. The Koyambedu cluster accounted for 1589 cases in the state. On 11 May, with 798 new cases, the total surpassed 8000 to become 8002 in the state. Chennai continued to be the worst-hit district. It recorded its highest single-day rise with 538 cases which brought the total to 4371. The state health minister said, "Chennai has cases from the Koyambedu cluster, front line workers cluster, hospital cluster and mediapersons cluster. Royapuram, Thiru Vi Ka Nagar, Kodambakkam and Teynampet are the four highly-affected zones in the city". On 14 May, state reported 447 confirmed cases, of which 24 cases were among interstate and international returnees to the state. On 15 May, state reported 434 confirmed cases, of which 49 cases were among interstate and international returnees to the state. On 16 May, state reported 477 confirmed cases, of which 93 cases were among interstate and international returnees to the state. The state reported 939 recoveries, highest reported discharges in a single day. On 26 May, the state reported its highest single day rise of 805, bringing the total to 17,082. Chennai accounted for more than 11,000 of the cases. The worst-affected regions of Chennai include Royapuram, Tondiarpet, Kodambakkam, Thiru Vi Ka Nagar, Anna Nagar and Teynampet. On 30 May, 938 new cases were reported, of which 616 were from Chennai. The recovery rate have improved to around 56%, with a total of 12,000 recoveries across the state. The number of active cases stood at 9,021. 31 prisoners in
Puzhal prison have tested positive.
June On 6 June, the state recorded 1458 new cases which took the total number of cases to 30,152. It had recorded over 1000 cases consecutively in last seven days. Chennai with 20,993 total cases had about 70% of state's cases. 16,395 patients have recovered across the state. On 9 June, the state government announced that it has cancelled the Class 10th board examinations which were scheduled to be held from June 15 and all students will be declared as passed. On 10 June,
MLA J. Anbazhagan from
Dravida Munnetra Kazhagam party died due to COVID-19 in Chennai. On 15 June, the state crossed 46,000 cases mark to reach 46,504 after recording 1843 new cases. Owing to the rise, the state government announced 12-day lockdown in four districts including Chennai, between 19 and 30 June 2020. On 17 June, the state witnessed over 2000 new cases for the first time after recording 2174 cases. It took the total number of cases over 50,000 cases to 50,193. The state had also tested over 25,000 samples in a day, its highest ever. The private secretary of Chief Minister's Office, Damodharan died due to COVID-19. Balamurali, a police inspector from Chennai died due to COVID-19 which was the state's first police personnel death. In mid-June, non-hotspot districts such as Madurai, Vellore, Cuddalore, Ranipet and Ramanathapuram saw rise in number of new cases. Officials thought that it might be due to the 'unlocking' of the state, mass influx of from Chennai and inter-district movement. Starting from 24 June, Madurai and
Theni districts entered stricter lockdowns following the rise. The state also re-imposed restrictions on inter-district travel until June 30.
July The total case count crossed 2 lakh mark in the state, with 2,06,737 cases on 25 July. The recovery rate was 73% while the case fatality rate was 1.65%, comparatively lower than other Indian states as of 25 July. The case growth rate in Chennai saw a dip in July. The number of daily new cases dropped from 2400 in the first week of July to 1013 on 31 July. Recovery rate improved from 60% to 85%. The city's positivity rate stood around 9% at the end of July. The disease spread intensified in other districts of the states like Madurai, where cases crossed 11,000 on 31 July. The districts Chennai, Kancheepuram, Chengalpattu, Tiruvallur and Madurai accounted for about 63.5% of the state's total cases.
August The total case count crossed 2.5 lakh mark in the state, with 2,51,738 cases on 1 August. The number of confirmed cases in Chennai crossed 1 lakh mark on 2 August. On August 3, Tamil Nadu's single day COVID-19 death toll crossed the 100 mark, after registering 109 fatalities. == Cases ==