And no studies may be carried out in a laboratory where other pox viruses are kept.

In the animal tests, a single dose of the drug was effective against pox virus for seven days.

The first engineering of a pox virus was done more than 20 years ago.

Among them is one genetically engineered from a weakened form of the canary pox virus.

You put the naked genome into a cell which has been infected by a related pox virus, see?

There's nothing really in the literature about prairie dogs having pox viruses.

Diseases caused by pox viruses, especially smallpox, have been known about for centuries.

Some pox viruses, as far as researchers can tell, infect only a single host.

And yet of all the pox viruses, it is the one most closely related to smallpox.

Along with related pox viruses it shows promise against some diseases of commercial poultry.