Guidance for Clinicians & Public Health Professionals(as on 28th April 2009)
What is swine influenza?
Swine Influenza (swine flu) is a respiratory disease of pigs caused by type A influenza virus that
regularly causes outbreaks of influenza in pigs. Swine flu viruses cause high levels of illness and
low death rates in pigs.
Like all influenza viruses, swine flu viruses change constantly. Pigs can be infected by avian
influenza and human influenza viruses as well as swine influenza viruses. When influenza
viruses from different species infect pigs, the viruses can reassort (i.e. swap genes) and new
viruses that are a mix of swine, human and/or avian influenza viruses can emerge. Over the
years, different variations of swine flu viruses have emerged. At this time, there are four main
influenza type A virus subtypes that have been isolated in pigs: H1N1, H1N2, H3N2, and H3N1.
However, most of the recently isolated influenza viruses from pigs have been H1N1 viruses.
Virenza (zanamivir capsules) - Inhaled antiviral for treatment of influenza A and B
Swine Flu Help / Tips:
Use “Nilgiri Oil” (Eucalyptus oil) drops on handkerchiefs and masks as one of the preventive measures against Swine Flu (NIV) National Institute of Virology.