A Jenkins virus is not grown. It is assembled from a living body and then released into the vein. The body is the genome. Tape is the capsid. Clothes are the envelope. Placement is infection.
Attachment
A person is chosen as template. In most of the outdoor work that person is the artist. The body is the only source of the form. Nothing is modeled from imagination at this stage. The cast can only copy what is already there.
Entry
The body is wrapped first in plastic so the tape never bonds to skin. That layer is the membrane the particle has to cross without destroying the host. Packing tape is then wound over the plastic until the form is rigid. The wrap is tight enough to take pores, seams, weight, the fall of a hoodie. Circulation in the living body is cut off for as long as the wrap holds. That is the cost of using a live cell as template.
Uncoating
The shell is cut off the body along predetermined seams. The person steps out. What remains is an empty skin, still in pieces. The living genome has left. Only the mold of it is left behind.
Replication
The pieces are taped back into a closed volume. Air, bottles, or stuffing give it enough interior pressure to stand. A second, third, twelfth copy can be pulled from the same body on other days. That is how one genome produces a population. The twelve casts under the ITV tower and the five polar-bear figures were the same operation run in series. Mannequins dressed to read as casts are defective particles: they occupy space in the same field but they do not carry the genome. They work only when real casts stand near them and lend them credibility.
Assembly
The empty form is dressed. Hood, shoes, mask, shopping cart, balloons, donkey head. Dressing is the envelope. It is what lets the particle pass as a blood cell instead of as an object. A figure that remains obviously tape is a failed virion. It never leaves the lab.
Release
The finished particle is carried into the vein and set down without a label. Unsanctioned placement is budding into live tissue. A permit, a chaperone, a nameplate is contamination: the cell is told in advance that the particle is not real, and the infection aborts. Once the figure is standing, the artist leaves. The original body is no longer present. Only copies circulate.
What happens after release is not making. It is replication in the host. Other cells encounter the particle. Some ignore it. Some pay it. Some call T-cells. Some dismantle it. Each reaction is the tissue answering an infection it did not authorize. The particle itself does not grow. It either holds its shape in the bloodstream or it is cleared.