Tamil Nadu health secretary Dr J Radhakrishnan has said Tamil Nadu will be commencing a state-wide serosurveillance study on Covid-19 exposure in a week.
The ICMR is conducting its own serosurveillance across the country in which samples from TN are also tested. Considered the gold standard to measure recent or past exposure to infectious diseases, sero surveillance study is conducted to ascertain the antibody levels produced against the infection by testing blood (serum or plasma) samples.
Tamil Nadu reported 4,666 fresh cases of COVID-19 on Tuesday. Chennai accounted for 1,164 cases and Coimbatore 398. The State also recorded 57 deaths, taking the toll to 10,371.
For the second consecutive day, the State reported less than 5,000 cases. A total of 6,65,930 persons have so far tested positive in the State. Of them, 43,239 were active cases. With the discharge of 5,117 more persons after treatment, the number of persons discharged rose to 6,12,320.
Barring Chennai, other northern districts of the state logged 1,147 cases. Among the western districts, where a total of 1,388 cases were reported, Coimbatore (398) contributed the maximum cases.
In the last 24 hours, 85,509 samples have been tested. This took the total number of samples in the state to 84,88,503. There are 191 testing facilities in the state.
Till date, a total of 12,42,797 have entered Tamil Nadu through various modes of travel, and 6,771 of them have tested positive.