He added that Erode, Namakkal, Salem, Chennai, Chengalpattu and surrounding areas are still witnessing an increase in the cases. While Coimbatore and Tiruppur have shown the stagnant and erratic trends, Tirunelveli, Tiruchy and Cuddalore had challenges earlier. Incidentally, even now Kerala continues to report cases and all districts bordering Kerala need to be on alert due to frequent travel and movement of persons.