A student under quarantine at the Nguyen Khuyen Private High School Friday.

More influenza A (H1N1) cases at local schools have stoked fears that students returning home from temporarily closed classrooms will spread the disease.

Three Vietnamese students and a foreign lecturer at the university, an affiliate of the Royal Melbourne Institute of Technology University in Australia, tested positive for H1N1 this week.

The four patients are being treated under quarantine at the Hospital for Tropical Diseases in the southern economic hub.

The school had initially announced on Thursday it would be temporarily closed until next Monday.

Meanwhile, six more students at Nguyen Khuyen Private High School tested positive for H1N1 Friday, raising the school’s total to eight cases. The two previous cases were detected on Thursday when the school was closed and turned into a temporary clinic for H1N1 quarantine and treatment.

Also on Thursday, more than 2,000 students at the school were allowed to go home for self-quarantine in the wake of the infections. Fifty others were quarantined at the school after examinations found them having flu-like symptoms.

However, the students returning home could be a source of further outbreaks as people having direct contact with the virus could be infected without flu symptoms for several days.

Many of the students had returned home on Thursday by both private and public means of transport.

Nguyen Van Chau, director of Ho Chi Minh City Department of Health, said a quarantine of too many students at the school could facilitate further infections in such a small crowded area. Health authorities have contacted local authorities to monitor the health of students who have returned home, the official added.

However, many Nguyen Khuyen students’ parents told Thanh Nien Friday that no one had come to check on their children’s heath yet.

Meanwhile, many parents crowed the high school Friday demanding to take their children home. The requests were rejected by health authorities on duty.

Nguyen Khuyen was the second boarding high school in the city to be hit with a H1N1 outbreak. Last Sunday, the Ngo Thoi Nhiem Private High School in District 9 was isolated after several students were diagnosed with the disease there.

Health authorities on Friday reported six more confirmed cases at Ngo Thoi Nhiem, raising the school’s total to 78, including five teachers.

The Ministry of Health Friday confirmed 33 new H1N1 cases, including 28 cases in the south, three from the north and two from the central, raising the country’s tally to 532 cases.

Of the total, 357 people had been discharged from the hospital after full recovery while 175 other cases were being treated at hospitals without any serious complication, the ministry reported.

Nguyen Huy Nga, head of the Bureau of Preventive Health under the Ministry of Health, on Friday said the fatality rate among H1N1 cases in the world had between 0.3-0.5 percent, while there had not been any fatal cases in Vietnam as of yet.

The World Health Organization (WHO) said Friday H1N1 virus has spread to almost every country in the world since it was discovered at the end of March, AFP reported.

“The spread of this virus continues, if you see 160 out of 193 WHO member states now have cases, so we are nearing almost 100 percent but not quite yet,” said Gregory Hartl, spokesman for the WHO.

Hartl added that H1N1 virus, which the WHO declared a pandemic in June, had resulted in around 800 deaths.

However, he said it was not possible to give a death rate for the virus given that “we don’t have the exact numerator or denominator.”

The WHO stopped issuing infection figures late last week. It said, however, that it was continuing to watch for the virus’s appearance in new territories.’

Meanwhile, Hartl said there remained many unknowns about the virus.

“We don’t know how the virus will change going forward,” he said.

Another unknown is how the virus would behave in the northern hemisphere’s winter, given that it had been monitored only during springtime in the north, he said.

Source: TN, Agencies