Sentence examples for of widespread circulation from inspiring English sources

During the eclipse phase, the virus evolves immune evasive characteristics, which when accumulated sufficiently permit a new phase of widespread circulation.

The scattered intrasubtype recombinants were generated during this period of widespread circulation.

The 2003 2004 influenza season was severe in terms of its impact on illness because of widespread circulation of antigenically distinct influenza A (H3N2) Fujian-like viruses.

Further proof of widespread circulation of MERS-CoV among dromedaries was provided by studies from Egypt and Saudi Arabia (5, 9 ).

Persons born before 1901 (the last year of widespread circulation of the 1890 Russian flu pandemic strain) and after 1875 (the first year after widespread epidemics of a poorly characterized influenza-like illness) were 18 43 years of age in 1918.

In January 2005, Churchill's work attracted publicity because of the widespread circulation of a 2001 essay, "On the Justice of Roosting Chickens".

We obtained serologic evidence of earlier and more widespread circulation of WNV in five other Mexican states, dating back to July 2002.

To the Editor: The World Health Organization Polio Eradication Initiative has reduced to 4 the number of countries with endemic transmission of wild polioviruses and has reported the widespread circulation of polioviruses that have evolved from attenuated vaccine (oral poliovirus vaccine [OPV]), so-called vaccine-derived polioviruses (VDPVs) (1, 2 ).

The absence of this reported virulence factor, as well as the presence of additional potential attenuating mutations in the original unpassaged Tabasco strain, could explain the lack of observed bird deaths in Mexico and Latin America, assuming a widespread circulation of this genotype throughout the region.

Our objective was to determine the distribution of the CPV variants in different European countries by using the new technology, with particular emphasis on the widespread circulation of CPV-2c in some areas of Europe.

Many scientists now believe that another influenza pandemic is inevitable some time soon.These concerns might be little more than another background worry if it were not for the fact that there is currently a strain of bird flu in widespread circulation to which humans have no natural immunity.