Facts About H1N1 Influenza (Pandemic Influenza)

2009-05-20
Facts About H1N1 Swine Flu

The true picture in Mexico is unclear.
  Mortality rate is unknown.
  Is it just a new type of a normal flu or a significant killer flu?

It is a “quadruple reassortant” virus which is capable of getting into cells of three types/categories of animals (humans, Asian/European pigs, birds).
  Virus will be fearsome with;
    Antigenic drift and antigenic shift (change of antigen)
    Recombination with H5N1 Avian Flu
    Recombination with Tamiflu resistant H1N1 A influenza  

H1N1 Flu may circulate for months to years and eventually emerge as the next pandemic strain. (It may already be the next pandemic strain beginning to emerge.)
 

Basic information about H1N1 flu is uncertain.
Incubation period
  CDC:  range from 1-7 days, more likely 1-4 days.
  WHO: may be 6, 7 or 8 days.

Infectious period
  1 day prior to the case’s illness onset to 7 days after onset.

Attack rate
  ?

Severity of illness
  Outside Mexico, those infected show flu symptoms although they recover.
  There seems to be some severe cases in North America.

Groups at high risk for severe illness
  Likely to be; <5, >65, pregnant woman, with chronic disease, with immunosuppression.


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