Final answer:
Cell (tissue) culture is considered an artificial method for propagating viruses, as it involves growing host cells in a controlled lab environment necessary for viral replication.
Step-by-step explanation:
Cell (tissue) culture is considered an artificial method to propagate viruses. This technique involves growing cells, tissues, or organs outside of the body in a controlled environment. For viral cultivation, host cells are necessary, which can be provided via in vitro methods using cell cultures. Cell culture involves growing individual cells in a culture media, while tissue culture is the cultivation of groups of cells in a laboratory glass environment.
Viruses rely on host cells for replication, and cell cultures serve as the substitute hosts in a lab setting. Primary cell cultures, made from fresh animal organs or tissues, are often used to support the growth of viruses and are essential in the production of vaccines, studying viral infection patterns, and conducting basic research. These cells grow attached to solid supports and require careful manipulation, typically within a laminar flow hood to prevent contamination.