They predicted that the more virus traps the scientists added, the more the virus population would shrink.
They are more common among heterosexual men than among women or gay men; experts believe that is because vaginal fluid contains more virus than the surface of the penis.
This means infected ducks put more virus into the environment than previously thought, increasing the chance of exposure for other animals and humans.
We predict that the larger the barn, and the more virulent the MDV strain is, the more virus is produced by the time the flock is slaughtered.
The more virus offspring are produced, the greater the chance that some will infect new hosts.
The more virus particles attach to the crystal, the more its vibrations slow down, offering an indication of the virus concentration in the sample.
Adding more virus genomes to the cell reduces the replicative output of the individual viruses in the cells such that the total amount of virus produced remains the same.
This would be possible when more virus strains infect the same host simultaneously, in this case the mallards.
Researchers at Columbia University have an additional theory – there may be more virus circulating in the spring, when camels are born.
In late August, the CDC made several changes to improve the test's sensitivity, such as authorizing laboratories to use larger volumes of blood that would contain more virus and make the evidence easier to detect.
