Viruses are a type of infectious agent that belongs to the domain of microbiology. They are considered to be non-living entities because they cannot replicate on their own and they need a host cell to survive.
Viruses are classified based on their genetic material, which can be DNA or RNA, and their method of replication. They are grouped into the following domains:
Viruses with DNA genome and replicate in the host's nucleus are classified under the domain Bacteria.
Viruses with RNA genome and replicate in the host's cytoplasm are classified under the domain Archaea.
Viruses can infect a wide range of organisms, including bacteria, plants, animals, and humans. They are responsible for a wide range of diseases, from mild colds and flu to more severe diseases such as AIDS, smallpox, and Ebola.
In summary, viruses are non-living entities that belong to the domain of microbiology. They are classified based on their genetic material and method of replication, and can infect a wide range of organisms causing a range of diseases.
