This system classifies viruses into families based on their genome type (DNA, RNA, single-stranded (ss), double-stranded (ds), etc.) and method of replication.
Viruses in each category behave similarly.
1. dsDNA viruses (e.g. Adenoviruses, Herpesviruses, Poxviruses)
2. ssDNA viruses (+ strand or "sense") DNA (e.g. Parvoviruses)
3. dsRNA viruses (e.g. Reoviruses)
4. (+)ssRNA viruses (+ strand or sense) RNA (e.g. Coronaviruses, Picornaviruses, Togaviruses)
5. (−)ssRNA viruses (− strand or antisense) RNA (e.g. Orthomyxoviruses, Rhabdoviruses)
6. ssRNA-RT viruses (+ strand or sense) RNA with DNA intermediate in life-cycle (e.g. Retroviruses)
7. dsDNA-RT viruses DNA with RNA intermediate in life-cycle (e.g. Hepadnaviruses)

Baltimore classification of viruses

The virology of COVID-19: How viruses infect host cells in the body

Virology of COVID-19

Focuses of Virology

References for virology by journal

The study of viruses and virus like agents. It deals heavily in their structure, classification, evolution, method of infection, effects of infection and how to cure or treat the infections.

University of Michigan - Ann Arbor

Viruses are simple microorganisms that infect cells with the potential to cause disease. A virus particle, or virion, is made of RNA or DNA and an outer protein shell called a capsid. Viruses are dependent on an infected host cell in order to reproduce; they cannot reproduce by themselves.

Viruses

- Virology
- bacteriology
- protistology
- mycology
- immunology 
- parasitology

Disciplines in microbiology

Wikipedia

Respiratory viruses are known as the major etiological agents of acute respiratory infections (ARIs).  They play a substantial role in morbidity and mortality all over the world.
Most typical respiratory viruses that circulate globally as endemic or epidemic agents are: influenza virus, respiratory syncytial virus, parainfluenza viruses, metapneumovirus, rhinovirus, coronaviruses, adenoviruses, and bocaviruses.

Respiratory Viruses

Virology

Arboviruses are viruses continuously spread in nature through biological transmission  from arthropods to humans and animals. 

Vector borne viral diseases (Arboviruses) 

Bacteriology is the study of bacteria and how that affect human health as well as agriculture

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