Since Bird Flu is Back (H7N9), I have spent a day doing Autopsy of it.
Yea, you heard it right, the flu monster is Back. This time in China (again).
Its time of the year
once again, that you are happy chicken is for bargain again, cheaper than
vegetables that you can have chicken in your both meals. Or, on the contrary,
there are places like the one I am in, Chicken-meal gets stiffer, as newspaper
and internet gets girdled with news of Bird flu outbreaks. Either way, yes, the
Bird flu season is back, only this time stronger than ever. There has been a
recent surge of Bird flu outbreaks in China. Avian Influenza A (H7N9),
discovered March 31 this year, has claimed 22 lives, and been reported in 109+1
cases, as of this morning. So far, only one case.
What exactly is this
Bird flu thing, that’s making us curse our chicken?
For beginners, Avian
Influenza (Bird Flu as known commonly)
is caused by Influenza virus. Chicken, Swine (Pig) etc. are the carriers
of it. Influenza virus is of three types, Influenza A, Influenza B and
Influenza C. Influenza A being the most dangerous and Influenza C being the
least. Each Influenza virus has two proteins that cause the disease,
Hemagglutinin(H) and Neuraminidase(N).
There are currently 16 different kind of H and 9 different kind of N proteins
identified in Influenza virus. Hemagglutinin acts to attach an influenza virus
to the inner surface of a cell so that the virus can replicate, while
neuraminidase lets the newly replicated viruses out of the cell to infect more
cells. You needn't need rocket science to figure out that these virus/influenza outbreak are named
after the kind of these proteins. If you remember the Avian Influenza of the
past five years, Swine flu and Bird flu outbreaks, they were caused by virus
strains, named H1N1 and H5N1 respectively.
Influenza symptoms
include fever, headache, cough, tiredness, sore throat, runny or stuffy nose,
body aches, and diarrhea or vomiting. These symptoms are common to several
illnesses, which makes it harder to determine the incidence of influenza,
particularly in countries where a doctor is not readily accessible. The most
common method of influenza transmission is birds/animals-human and
human-to-human transmission is possible. A person may infect others even though
they seemingly have no influenza symptoms, and seemingly this is the most
dangerous scenario isnt it? Up to now, one of the deadliest influenza strains,
avian influenza A (H5N1) "Bird Flu", is fortunately not easily spread
from human-to-human. This current outbreak of Avian Influenza in china is named
H7N9. During same time of the year, in 2009 the most recent influenza pandemic
occurred, wherein a new strain of influenza A, pandemic A (H1N1) 2009, emerged,
spread rapidly around the world, and caused sustained community-level outbreaks.
How dangerous is
this Chinese flu that’s cooking our news daily?
The timing of the
outbreak, and origin might suggest that, it is the re-emergence of Avian
Influenza A (H1N1), "swine flu" pandemic. Is it really? Probably not. Reports are coming that, H7N9
is an especially bad flu, with mortality rate more than 20 percent. If true,
this would be terrifying: the 1918 Spanish Flu, which has been called one of
the deadliest plagues in human history, also had a mortality rate of around
twenty per cent.
(note: more than 50% of world's population got
infected by flu and more than 50 million people died in 1918's pandemic)
"This is an
unusually dangerous virus for humans," said Keiji Fukuda, assistant
director-general for health security of the World Health Organization (WHO), at
a press conference in Beijing this morning. From what is known so far, he
added, H7N9 "is more easily transmissible from poultry to humans than
H5N1."
Really, No kidding
right? Are we all going to die then, like Contagion (movie)?
The scenes of
contagion (movie) might come real, be it now or later. And sadly, we aren't
ready to face it, we might never be actually. But in case of Avian influenza A,
H7N9, there is some hope though.
Scientists measure
the likelihood of spread of influenza virus in the R0 (r-zero), or Basic
Reproduction Number. H1N1 had an R0 of around 1.5—every person infected with
H1N1 infected 1.5 other people on average—ten victims infected fifteen victims,
who then infected twenty-three victims, and so on. H7N9, however, seems to have
an R0 of zero, at least between humans. Scientists call this “stuttering
transmission,” in which an animal virus infects a person, but further
human-to-human transmission does not occur. Influenza viruses constantly change
and it’s possible that this virus could become able to easily and sustainably
spread between people, triggering a pandemic.
Bad news, good news,
bad news.. Ye?
Cant a pandemic be avoided? what about Vaccines?
Past experience
shows that high-resource countries may experience mild disease from influenza,
but more severe disease may occur, with higher mortality, in developing
countries. New options for influenza vaccine development are an important
component of pandemic preparedness for both poor countries and the world
community. Rapid production and distribution of pandemic influenza vaccines
could potentially save millions of lives during an influenza pandemic.
Preparatory efforts are under way to advance technologies that can be produced
more easily and affordably than current vaccines and do not rely upon egg-based
technology, which could be compromised in the event of an avian-strain
pandemic. Investigating new vaccine technologies will benefit real-time
response in a possible future pandemic, but there is no immediate solution yet.
Forget the Flu, the
bigger question is, can I eat my Chicken-roast or Not?
The answer is yes!
Yes, Definitely. So far there is no case reported of Bird Flu or Swine flu or
this Chinese flu, can be spread through eating poultry. You need to be in close
proximity to live, infected birds to catch the current mutation of the virus.
The AIIMS website says, The virus is destroyed at a temperature of 70o C for 30
minutes. A common notion of safe practice of Poultry cooking is to cook them at
around 165 degree Celsius.
So, yes,.. Stop
reading this post and go eat your Chicken Roast. YAY! indeed.
(on other note, did
anyone read Stephen King’s novel “The Stand?" The super flu "Captain
Trips", had an R0 of about five. A group of ten people would infect fifty,
who then infected two hundred and fifty people, and so on. Coupled with a mortality
rate of 99.4%, Captain Trips effectively ended human society.)
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