Sentence examples for has circulated continuously from inspiring English sources

Since its introduction into the Americas in 1981, DENV-4 has circulated continuously in the Caribbean basin (5 ) and northern South America with little evidence of widespread transmission further south into the continent during the past 25 years (4, 6, 7 ).

In Nigeria, genotype B3 has circulated continuously, at least during 1997 2005.

While new influenza A viruses periodically emerge from animal reservoirs to become endemic in humans (Neumann et al., 2009; Smith et al., 2009), influenza B viruses, first recognized in 1940, have circulated continuously in humans alongside influenza A viruses and are presumably derived from a single, as yet unknown, source (Francis, 1940; Chen and Holmes, 2008).

Thus, several lineages of genotype B2 have probably circulated continuously in central and southern Africa since at least the 1980s, but were never reported because of suboptimal molecular surveillance.

Despite having circulated in humans for more than a century, HCoV-OC43 is also found to be continuously evolving, with the recent emergence of a novel genotype due to natural recombination.

Scenarios blaming the C.I.A. have circulated.

Rumors of a potential ban have circulated for months.

They've circulated rumors all these months.

The nutrient relies solely on wastewater of nile tilapia (Oreochromis niloticus) cultivation circulated continuously on the aquaponic system.

Although all 4 DENV serotypes circulate on the island, DENV-2 circulated continuously for 25 years.

The results revealed that the two viruses circulated continuously in 2012 and 2013.