The State Drug Control Administration, which began a probe into the death of a baby boy within a few hours of vaccination, has sent the samples of the batch for analysis to the Central Research Institute.

A two-month-old baby had died at his residence a few hours after three vaccines — Pentavac, Oral Polio Vaccine and IPV — were administered at a city hospital. The parents of the baby residents of Salivahananagar in Moosarambagh suspected that something went wrong and approached officials.

Mr P. Srinivas, the father of the bay and a resident of Salivahanaangar in Moosarambagh, said, “My wife delivered twins — a boy and girl — at the Sashi hospital on May 16. In the first week of July, we had gone to the hospital to get the kids vaccinated.

“Though our daughter was fine, our son died few hours after getting the vaccines. We have shifted to Warangal now. We didn’t want to book a case.”

The Drug Control Administration deputy director, Ms K. Sakkubai, said: “After we received the information, our teams went to Sashi hospital at Dilshuknagar and collected samples. They have been sent to Kasuali and we are waiting for the results. The doctors, however, are saying that the death may be linked to milk aspiration.”

The deputy director added, “The parents didn’t lodge a complaint or agree for a post-mortem. Though we had asked for the recall of the batches of vaccines, we could only get back 42 vials. The remaining vials are not available in the market anymore.”

Dr Sashi Kiran of the Sashi Hospital said, “The baby died at home after 17 to 18 hours of vaccination. The death didn’t occur in the hospital. Death may have occurred due to sudden infant death syndrome or milk aspiration.”