"Hospitals in Hà Nội have reported an increasing number of people infected with influenza A since early this month, even though the flu is usually more prevalent during the transitions between winter and spring."

"Avian influenza or bird flu refers to the disease caused by infection with avian (bird) influenza (flu) Type A viruses, including H1N1, H5N1 and H7N9.

The symptoms of bird flu virus infections in humans can range from mild illness to severe symptoms such as pneumonia and include fever coughing, a sore throat, runny or stuffy nose, muscle or body aches, headaches, fatigue, and shortness of breath or difficulty breathing. Less common signs and symptoms include diarrhoea, nausea, vomiting, or seizures.

Bird flu virus infection in people cannot be diagnosed by clinical signs and symptoms alone; laboratory testing is needed. Bird flu virus infections are usually diagnosed by collecting a swab from the upper respiratory tract (nose or throat) of the sick person. Testing is more accurate when the swab is collected during the first few days of illness.

According to the hospital, within the last two weeks, nearly 100 people have been found with bird flu. Of those, the hospital has recorded some severe cases. Many cases have pneumonia and are being monitored for treatment. Some severe cases require ventilation."

less than 50%

[link to asianews.network (secure)]

Doctors warn bird flu cases rising abnormally this summer

[link to vietnamnet.vn (secure)]