Chief Minister Tarun Gogoi also said the government would bear all the medical expenses of the victims.
Four persons have tested positive for HIV after they were transfused blood at civil hospital in Mangaldoi town, some 70 km from Guwahati.
The state government has already instituted a one-man commission headed by Additional Chief Secretary P P Varma to probe into the incident. The commission will submit the report within a month.
Gogoi has also asked the state Advocate General to explore legal options for initiating action against those found guilty for the serious lapse, an official release said.
The in-charge of the blood bank and two laboratory technicians at Mangaldoi Civil Hospital were suspended by the district administration yesterday.