What is the infectious onset of the virus?

it’s a nucleic acid
Viruses are a non-cellular form of life representing autonomous genetic structures (DNA viruses, RNA viruses) that can multiply in plant and animal bacteria that are sensitive to them.

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.