The video starts with a close-up of a virus particle, which is a small, spherical object with spikes protruding from its surface. The virus particle is shown moving through a body of water, surrounded by tiny bubbles. As the virus particle moves, it comes into contact with a cell, which is a larger, circular object with a nucleus at its center. The virus particle then attaches to the cell's surface, and its spikes begin to penetrate the cell's membrane. The virus particle then injects its genetic material into the cell, which causes the cell to begin replicating the virus. The video ends with the cell bursting open, releasing more virus particles into the surrounding area.