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What is flu (influenza)?

Flu (influenza) is a common infectious viral illness, which spreads through coughing and sneezing.

You may get flu any time of the year, but more commonly, in the winter season; hence, it is also known as seasonal flu. Influenza is caused by RNA viruses, which infect the respiratory tract. Compared to other viral infections like common cold, influenza virus can cause severe illness with a mortality rate of 0.1%. Most often, influenza resolves in about a week or 10 days.

Children under 5 years of age and adults over 65 years of age are at a higher risk of getting infected with the influenza virus. Pregnant women, individuals with weak immunity, those working at a health care centre, and individuals suffering from chronic respiratory illness are also at greater risk of influenza infection.

What are its main signs and symptoms?

Initially, flu may feel like any other common cold. Common symptoms maybe a sore throat, runny nose, and sneezing. The major difference between cold and flu is that the flu develops rapidly unlike cold. The symptoms usually develop within 1 to 3 days following infection and usually people feel better within a week.

The symptoms of flu are listed below:

What are the main causes?

Influenza virus causes flu and is of three types- influenza A, B, and C. Types A and B cause severe infection of the respiratory tract often leading to epidemic-like condition with higher death rate compared to type C.

The virus is transmitted from an infected person either through sneezing, coughing or talking. Sometimes, you may directly inhale the infected droplets or get infected from touching the surfaces contaminated by the virus. Infected individuals are highly contagious even before symptoms begin- first five days before the first symptom appears.

The influenza virus undergoes constant change over time i.e. they undergo mutation. This makes you prone to viral infections throughout your life.

How is it diagnosed and treated?

You should rest at home and drink plenty of water to stay hydrated. You should also visit the doctor for a check-up. Your doctor may collect your respiratory samples to test for polymerase chain reaction (PCR), rapid antigen test or immunofluorescence assay.

Then, your doctor will prescribe you with antiviral medication. These antiviral medications have few side effects like nausea and vomiting.

Symptomatic treatment is also prescribed to reduce fever and reduce discomfort with the help of antipyretics and anti-inflammatory drugs. In case of infants, breastfeeding frequency should be increased to maintain the hydration level of the baby.

  1. Medicines for Flu (Influenza)
  2. Doctors for Flu (Influenza)
Dr. K. K. Handa

Dr. K. K. Handa

कान, नाक और गले सम्बन्धी विकारों का विज्ञान

Dr. Aru Chhabra Handa

Dr. Aru Chhabra Handa

कान, नाक और गले सम्बन्धी विकारों का विज्ञान

Dr. Yogesh Parmar

Dr. Yogesh Parmar

कान, नाक और गले सम्बन्धी विकारों का विज्ञान

Medicines for Flu (Influenza)

Medicines listed below are available for Flu (Influenza). Please note that you should not take any medicines without doctor consultation. Taking any medicine without doctor's consultation can cause serious problems.

Medicine NamePack SizePrice (Rs.)
Grilinctus CdGrilinctus Cd 4 Mg/10 Mg Syrup66
WikorylWIKORYL 325 TABLET DT 10S32
VaxigripVaxigrip 0.5 Ml Prefilled Syringe776
NormoventNormovent Syrup55
Parvo CofParvo Cof Syrup52
PhenkuffPhenkuff 4 Mg/10 Mg Syrup52
Dr. Reckeweg Kali Iod 3x TabletDr. Reckeweg Kali Iod 3x Tablet 164
Phensedyl CoughPhensedyl Cough Linctus92
Mama Natura NisikindSchwabe Nisikind Globules88
RancofRancof 4 Mg/10 Mg Syrup65
Dr. Reckeweg Gelsemium DilutionDr. Reckeweg Gelsemium Dilution 1000 CH136
RecodexRecodex 4 Mg/10 Mg Syrup100
ADEL Gelsemium Mother Tincture QADEL Gelsemium Mother Tincture Q 208
Respinex CdRespinex Cd 4 Mg/10 Mg Syrup20
RexcodRexcod Syrup48
RexcofRexcof 4 Mg/10 Mg Syrup36
Schwabe Aconitum napellus LMSchwabe Aconitum napellus 0/1 LM80
SBL Eupatorium cannabinum DilutionSBL Eupatorium cannabinum Dilution 1000 CH86
Kufma SyrupKUFMA SYRUP 100ML52

Do you or anyone in your family have this disease? Please do a survey and help others


  1. NHS Inform. Flu. National health information service, Scotland. [internet].
  2. Oregon Health & Science University. A Guide for Parents - Seasonal Flu Information. Portland, Oregon. [internet].
  3. British Medical Journal. Influenza. BMJ Publishing Group. [internet].
  4. Ministry of Health. Influenza. Wellington, New Zealand. [internet].
  5. Center for Disease Control and Prevention [internet], Atlanta (GA): US Department of Health and Human Services; Frequently Asked Flu Questions 2018-2019 Influenza Season
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