The virus binds to the surface of the host cell, and then it penetrates completely (endocytosis) or introduces its nucleic acid into the cell using special mechanisms. For example, bacteriophages “sit” on the cell membrane of the host bacterium, and then “turn inside out”, releasing the nucleic acid inside the bacterium. Some viruses contain enzymes inside the capsid that dissolve the protective membranes of the host cell.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.