A(H1N1)pdm09 (Swine flu): All you need to know- Part 2 (Categorization: Latest MoHFW guidelines)

Categorization of patients based on risk:

Category A

Symptoms/ Signs: Mild fever + sore throat/ cough with/ without bodyache, headache, diarrhea and vomiting.

Treatment: Symptomatic

Oseltamivir: Not required

H1N1 testing: Not required

Monitoring: 24-48 hours by a doctor.

Prevention: Patients should stay at home and avoid mixing with public and high risk members of family.

Category B

This has two sub-categories:

i) In addition to signs and symptoms of Category A, high grade fever and sore throat is present.

May require home isolation and Oseltamivir

H1N1 testing: Not required

ii) In addition to signs and symptoms of Category A, one or more of the following high risk categories is present:

  •    Children with mild illness but with predisposing risk factors.
  •    Pregnant women;
  •    Persons aged 65 years or older;  
  •    Patients with lung diseases, heart disease, liver disease, kidney disease, blood disorders, diabetes, neurological disorders, cancer and HIV/AIDS;
  •    Patients on long term cortisone therapy.

Treatment: Broad spectrum antibiotics as for Community Acquired Pneumonia


H1N1 testing: Not required

Prevention: All patients of category B (i) and (ii) should confine themselves at home and avoid mixing with general public; high risk members of their family

Category C

In addition to signs and symptoms of category A and category B, the patient has one or more of the following:

  •  Breathlessness, chest pain, drowsiness, fall in blood pressure, sputum mixed with blood, bluish discolouration of nails
  • Children with influenza like illness who had a severe disease as manifested by the red flag signs (Somnolence, high and persistent fever, inability to feed well, convulsions, shortness of breath, difficulty in breathing, etc)
  • Worsening of underlying chronic conditions.

Treatment: Immediate hospitalization and treatment

H1N1 testing: Required

Useful links:

Technical guidelines (Ministry of Health and Family Welfare)


Risk categorization (Revised 11/2/2015)


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