'This year there is a sharp spike in fever cases, and it seems to be more than the pre-COVID-19 levels.'
The AIADMK leader had sought parole for 15 days, but she has been granted for five days.
Natarajan was admitted to the hospital on Saturday with severe chest infection and was put on ventilator support.
She visited her husband M Natarajan, who underwent liver and kidney transplantation at a hospital in Chennai, on all five days of her parole period.
The AIADMK leader's car briefly halted in front of a Ganesha temple in Kotturpuram and she prayed from inside the vehicle as used to be done by Jaya.