Re: Cocirculation of Influenza Viruses
I made a picture about H1,H3 cocirculation in China since 1997,
but wait for the WHO-copyright response before I post it.
The current situation looks similar to 1995/6 , when H1 also
suddenly outcrowded H3 in China but then H3 returned
nevertheless in 1996/7
H3 was clearly dominant in China from 2002 until the summer-wave in 2005
In 2003,2004 there was very little H1, even less than now.
But it survived (where ?) and even became dominant in 2005/6.
Is it because people became immune to H3 after the severe summer wave in 2005 ?
Remember, Southern China (Hong Kong) usually has 2 waves per year,
however the timings are not so clear as in USA,Europe.
Remember also, that flu-waves are believed to usually start/emerge in SE-Asia.
Flu usually doesn't survive summer in USA but rather is newly introduced the next season
from Asia with the then dominating strains from there.
** is different(so far), of course.
I made a picture about H1,H3 cocirculation in China since 1997,
but wait for the WHO-copyright response before I post it.
The current situation looks similar to 1995/6 , when H1 also
suddenly outcrowded H3 in China but then H3 returned
nevertheless in 1996/7
H3 was clearly dominant in China from 2002 until the summer-wave in 2005
In 2003,2004 there was very little H1, even less than now.
But it survived (where ?) and even became dominant in 2005/6.
Is it because people became immune to H3 after the severe summer wave in 2005 ?
Remember, Southern China (Hong Kong) usually has 2 waves per year,
however the timings are not so clear as in USA,Europe.
Remember also, that flu-waves are believed to usually start/emerge in SE-Asia.
Flu usually doesn't survive summer in USA but rather is newly introduced the next season
from Asia with the then dominating strains from there.
** is different(so far), of course.
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