On July 25, according to the report of the Mai Son Regional Medical Center, at 10:00 p.m. on July 23, the unit received information from the Mai Son Commune Health Station about the case of N.N.B.H (born in 2023), studying at Hong Ngoc Kindergarten, who died at Son La Provincial General Hospital after nearly a week of intensive treatment.
Before that, on the morning of July 17, baby H was taken to the nursery by his father. By the afternoon of the same day, the child had symptoms of coughing, runny nose, fever and fatigue. The teacher discovered unusual signs and called the mother to pick the baby up and take him home.

The family gave the child fever-reducing medicine and monitored it at home. However, by noon on July 18, the condition did not improve, the child was taken to a private clinic and recommended to be transferred to a hospital.
At about 12:30 on the same day, the child was admitted to Son La General Hospital, diagnosed with pneumonia caused by RSV virus and taken to the Emergency Resuscitation Department. Despite being on a ventilator and receiving intensive treatment, the child did not survive and died at 7am on July 23.
Immediately after recording the death, Mai Son Regional Medical Center established a monitoring team at Hong Ngoc Kindergarten.
The health agency sprayed disinfectants throughout the classroom and school grounds, made a list of children in the same class, advised parents to take their children for early examination and treatment, and disseminated information to teachers and parents about the transmission line, symptoms and prevention of diseases caused by the RSV virus.

The report said that Hong Ngoc Kindergarten currently has 270 children, and has recorded 9 cases positive for RSV virus.
Of which, 1 case has died, 5 children are being treated at the National Children's Hospital (Hanoi), 2 children are being monitored at Mai Son Regional General Hospital and 1 child is being treated at the Provincial General Hospital.
Respiratory sympathetic virus (RSV) is one of the common causes of lower respiratory tract inflammation in young children, especially infants and children under 2 years old. RSV is spread strongly through drop shots from patients when coughing, sneezing, or contact with surfaces or objects contaminated with viral secretions.
Common symptoms include: cough, fever, runny nose, fatigue, shortness of breath. In young children, RSV can cause serious complications such as pneumonia, bronchitis, acute respiratory failure, and even death if not treated promptly.