Photo/Illutration The Saitama city government building in Saitama (Asahi Shimbun file photo)

SAITAMA--A student in his teens who became infected with the novel coronavirus died even though he was vaccinated twice and had no pre-existing conditions, the Saitama city government reported on Feb. 16.

Only four people in the age group of 10 to 19 had died from causes related to COVID-19 as of Feb. 8, the day before he died, according to the health ministry.

The student, who resided in Saitama city, had a high fever of 40 degrees Celsius on Feb. 2, according to the city government.

The following day, he went to a medical institution and tested positive. But the medical institution did not submit the case report to a public health center.

The student's high fever persisted, hovering at 40 to 42 degrees, and he was shivering at home. A family member who lived with him made an emergency call on Feb. 6.

When the ambulance arrived at his house, emergency personnel found that there was no decrease in his blood pressure or blood oxygen saturation level. They judged that he did not need to be hospitalized, so he was not transferred to a hospital.

At that time, they found that the case report had not been submitted to a public health center. It was submitted later that day.

On the morning of Feb. 7, the student's health deteriorated rapidly as his blood pressure dropped, and he started to lose consciousness.

A family member made another emergency call and he was sent to a hospital where he received medical treatment. However, he died on Feb. 9.

The cause of death was determined to be disseminated intravascular coagulation syndrome, a rare condition that causes blood clotting, brought on by his novel coronavirus infection, a city official said.