[单项选择]
Pandemic H1N1 2009
The most active areas of pandemic influenza transmission currently are in central and eastern European countries. A high intensity of respiratory diseases activity
(51) concurrent circulation of pandemic influenza still
(52) parts of southern and eastern Europe,
(53) in Greece, Poland, and Ukraine.
In Western Europe, influenza
(54) remains active and widespread, but overall disease activity has peaked. All influenza viruses in Western Europe were pandemic H 1N1 2009, however, very small
(55) of seasonal influenza viruses, covering less than 1% of all influenza viruses
(56) , were reported in Russia.
(57) , limited available data indicate that active, high intensity transmission is occurring in Northern African countries
(58) the Mediterranean coast.
In Central Asia, limited data
(59) that influenza virus circulation remains active,
A. both
B. all
C. none
D. neither
