The 3,000 classmates of the first person to die of A/H1N1 influenza in Beijing have returned to classes at Beihang University.

The final group of students, who were found to be suffering from H1N1, returned to classes on Sunday, after spending nearly two weeks in quarantine in Daxing county.

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The students went into lockdown after the death of a male freshman during compulsory military drills on Oct 27.

His classmates were tested for the virus, and a group of students that did not show any fever symptoms returned to classes on Nov 1.

A second group of students, who were found to be suffering fever symptoms but tested negative for H1N1, returned to the university campus about a week later, leaving the third and final group to recover in isolation.

Yan Tao, a 19-year-old student at the university's School of Advanced Engineering, said students were advised to stay in their dormitories when they returned to the school.

"In the first three days after we got back to school, we were advised to stay in the dormitory to prevent the spread of the disease," he said.

"The school provided free meals to us and some older students also brought hot water for us."

Yan said students remained calm at the university, the nation's top aeronautic and astronautic institution, despite the recent tragedy.

"We are expecting to see our teachers and I believe they also missing all of us," he said.

An employee of a Chinese takeaway restaurant near the university, said: "Business is good this winter because students don't want to go outside due to the H1N1 outbreak. There are about 100 students living in this building and I can sell at least 20 food boxes in one day for lunch."

According to the university website, vaccinations for students began last Tuesday and were completed Sunday.