What does a virus need to supply ATP for energy or proteins build body parts?

Viruses are obligate intracellular parasites, meaning they require a living host cell in order to replicate and survive. They do not have their own metabolism, and therefore rely on the host cell's machinery to provide energy and building blocks for their replication.

Specifically, viruses need to utilize the host cell's ATP (adenosine triphosphate) for energy and its proteins to build their body parts (e.g. capsid proteins, envelope proteins). ATP is the universal energy currency of cells, and it is required for a variety of cellular processes, including viral replication. Proteins are essential building blocks of cells, and are used to construct viral components such as the capsid, which encloses the viral genome, and the envelope, which surrounds some viruses.

In order to access the host cell's ATP and proteins, viruses often manipulate the host cell's signalling pathways and cellular processes. They may also encode their own proteins that can interfere with the host cell's defenses or redirect cellular resources towards viral replication.