The chicken flu is the most common bird flu strain known to science, but its distribution is more complex than most.
According to researchers at the Centers for Disease Control and Prevention (CDC), there are about 10,000 different strains of the flu, and that number increases as strains spread through the environment.
In addition, it’s difficult to quantify how many farm animals are infected with the virus.
For example, the virus can infect only some animals and not others, according to the CDC.
But that’s not to say that farm animals don’t pose a risk.
While it’s possible to transmit the virus to livestock in the wild, that’s extremely rare, and there are few studies that track how the virus is spread between farm animals.
The researchers from the CDC and the U.S. Department of Agriculture (USDA) found that farm animal transmission of the virus has occurred in recent years, as more and more people have been infected in their homes, said the report.
This study was published online Feb. 11, 2017.
“We were surprised that there were so many outbreaks in the past year,” said Dr. Matthew Furlong, the lead author of the study.
“Our data suggest that there may be a relationship between farm animal and human transmission of chicken flu.”
Furleng and his colleagues examined a database of the most recent U.K. influenza data from the year 2009.
They found that a total of 542,094 cases were reported in the United Kingdom in that time period, compared with 1,082,932 cases reported in 2010, according the CDC website.
The two-year span included a period in which there were two large outbreaks of the bird flu, one in September and one in October.
That led to the outbreak of the second of the two outbreaks, which occurred in October and November.
During that time, the number of reported cases in the U, United Kingdom and the United States was essentially identical.
So, Furlawong said, it wasn’t really surprising that the number and frequency of outbreaks in poultry and farm animals would be similar over time.
What was surprising was the extent to which the poultry and dairy industry was involved in transmission of that virus to humans.
For instance, in the last three years, there have been more than 2.5 million chicken farms in the UK, according U.k. government data.
The data showed that about 1,000 to 2,000 of those farms were connected to a chicken farm in the Netherlands, according data from Dutch public health authorities.
There were 2,907,000 chicken farms that were connected, according Dutch data.
Another 1,074,000 farms in Britain were connected.
Furlwong and his co-authors concluded that “there is a very high likelihood that farm poultry are the source of the human-to-human transmission of avian influenza.”
Department for Agriculture and the USDA did not immediately respond to an email seeking comment.
The chicken virus is transmitted from infected animals to people via the saliva of infected animals, so it’s unlikely that farms are the sources of the new virus in the future, said Furlafwong.
However, the fact that there is more evidence linking the two, he said, could be cause for concern.
“It is conceivable that the poultry industry has been responsible for the introduction of this virus into humans,” Furlgong said.
“This could lead to a higher risk for transmission of poultry viruses to humans.”