Symptoms:
Diarrhoea
Fever (greater than 100°F or 37.8°C)
Headache and body aches
Being extremely irritable
Bluish skin color
Rapid breathing or trouble breathing
Fever with a skin rash
Not drinking enough liquids
Not waking up or interacting
Emergency warning signs in adults are:
Confusion
Difficulty breathing or shortness of breath
Pain or pressure in the chest or abdomen
Severe or persistent vomiting
Sudden dizziness

Treatment
Call your doctor if you think you have the flu. Prescription anti-viral drugs such as TamiFlu or Relenza can be called in by your doctor. It is best not to report to a hospital, as you could risk spreading the disease. Call your doctor and do what he tells you.

Reduce the risk of catching or spreading flu
Cover your mouth and nose when coughing or sneezing. Use a tissue.
Dispose of used tissues carefully.
Wash your hands frequently with soap and water.
Clean hard surfaces (e.g. kitchen worktops, door handles) frequently using a normal cleaning product.

Hospitals prepared to deal with the flu
Dhaka Medical College
Salimullah Hospital
Suhrawardy Hospital
National Institute for Disease of Chest and Hospital (NIDCH)
Infectious Disease Hospital (IDH)
Bangabandhu Sheikh Mujib Medical University
BIRDEM
Bangladesh Medical College Hospital, Dhanmondi
Uttara Adhunik Hospital, Uttara
Holy Family Medical College Hospital
Dhaka National Medical College Hospital
Dhaka Shishu Hospital
Shahabuddin Medical College Hospital
Mohanogor Shishu Hospital
Mohanogor General Hospital (Karmajibi Hospital)
Plus 95 City Corporation Health Care Centers run by NGOs across country