The structure of a virus typically consists of a core of genetic material, which can be either RNA or DNA, encased in a protective protein coat known as a capsid. Some viruses are further enveloped by a lipid membrane derived from host cell membranes. This structure varies widely among different viral types, influencing how they infect host cells and replicate. The viral genome carries the necessary information for producing new viral particles, while the capsid aids in recognizing and entering host cells. Understanding viral structure is essential for developing vaccines and treatments against viral infections.