Sentence examples for could have been circulating from inspiring English sources
Separately, federal health officials said a study of flu genes released Friday showed that the virus could have been circulating undetected in pigs for years, and called for better surveillance.
Serum neutralization results suggested that at least 4 serotypes could have been circulating in deer from Mauritius.
This fact suggests that the virus may be endemic to this novel ecologic setting and could have been circulating undetected in nature for a long time.
We hypothesized that the virus could have been circulating on the island without causing detectable illness or death in humans, horses, or birds.
It announced a massive $650 million influx of outside funding from the likes of Ford and Microsoft last spring, and rumors have been circulating that it could go public at some point.
The "Today" host couldn't help but mention the pregnancy rumors that have been circulating for weeks.
The findings suggest that early ancestors of yeast could have been similarly resourceful, working with whatever small amounts of O2 may have been circulating in the oceans before the gas was detectable in the atmosphere.
"The ethics board could not make such determination simply on the basis of any rumours that may have been circulating in or about November 2011 and nothing more.
Rumors about lavish payments have been circulating.
"We have been circulating for 110 years.
Such scenarios have been circulating widely in parliament's corridors.
