Odisha recorded 16 coronavirus cases on Tuesday, while there was no fatality for the fourth consecutive day, the health department said.
The Odisha government reduced the isolation norms to seven days if a Covid patient has no fever for three consecutive days.
The incident came to light on Thursday after social activist Kunal Gourav posted about the goof-up on social media platforms.
Urging people to strictly adhere to COVID guidelines, the administration has reimposed several restrictions in view of the alarming situation.
Uncertainty looms over conduct of the panchayat elections in the State owing to the rapid build-up of the COVID third wave.
Dr Bijay Panigrahi said all preparations have been made to ensure the drive is conducted in strict adherence to protocols.
Mohapatra said those tested positive for the Omicron variant are either asymptomatic or with mild symptoms and their condition is stable.
Odisha reported 298 new cases, the highest number of infections in over a month, which took the tally to 10,55,132.
Although nearly 900 persons have returned to Bhubaneswar, less than 100 samples were sent for tests and most of the others are yet to be traced.
The State has so far administered single dose to around 81 per cent and double dose to 40 per cent of its targeted 3.25 crore population.
However, the inoculation target has been slashed in some districts where the vaccination has gone slow.
Besides, another reason behind beneficiaries not opting for the second dose was attributed to the myth that even a single dose would make them immune to the deadly virus.
Districts have been advised to form special vax teams and send them to villages for vaccination.
The 521 new cases included 65 children and adolescents in the group of 0 to 18 years.
Prafulla Rout was involved in spreading awareness on COVID safety norms and even carried out distribution of face masks among villagers.