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The 29 pages that link to Virus, each with the reason it gives.

• Sexually transmitted infectionNarrower topic: Viruses cause infections including HIV, genital herpes, and human papillomavirus.

• Germ theory of diseaseBroader topic: Viruses extend germ theory beyond organisms that grow independently in culture.

• PathogenBroader topic: Viruses depend on host cells and are among the most numerous pathogen types.

• Cell theoryCompared with: Viruses challenge simple definitions of life without contradicting the theory’s account of cellular organisms.

• BacteriaCompared with: Viruses can infect bacteria but are not cellular organisms.

• PrionCompared with: Unlike viruses, prions propagate without a nucleic-acid genome.

• Infectious diseaseBroader topic: Viruses cause infections but require host cells to reproduce.

• Antiviral drugNarrower topic: Antiviral drugs target viral processes that depend on a living host cell.

• Bacterial taxonomyCompared with: Viruses are classified under separate systems rather than bacterial taxonomy.

• ProkaryoteCompared with: Viruses are sometimes compared with prokaryotes, but they are not cellular organisms.

• BacteriumCompared with: Viruses are not cells and cannot reproduce as bacteria do.

• Viral latencyNarrower topic: Latency is one possible state in the life cycle of some viruses.

• ViremiaNarrower topic: Viremia describes where viruses are found, not a separate kind of infectious agent.

• Viral replicationNarrower topic: Viral replication is the intracellular reproduction of this broader class of agents.

• DisinfectantBroader topic: Some disinfectants inactivate viruses, while performance depends on viral structure and product formulation.

• InterferonRelated: Viral infection is a major trigger for interferon responses and a target of their defenses.

• Life (biology)Compared with: Viruses evolve and carry genetic information but depend on host cells for reproduction.

• Martinus BeijerinckNarrower topic: Beijerinck’s work helped establish viruses as infectious agents distinct from ordinary bacteria.

• OrganismCompared with: Viruses reproduce through host machinery but lack the independent metabolism typical of organisms.

• Wendell Meredith StanleyNarrower topic: Stanley’s findings helped establish viruses as objects of biochemical investigation.

• Obligate intracellular parasiteBroader topic: Viruses are the best-known obligate intracellular agents, though their status as organisms is debated.

• Dmitri IvanovskyNarrower topic: The category emerged from research such as Ivanovsky’s on agents that passed through bacterial filters.

• Theodor SvedbergRelated: Ultracentrifugation can separate and analyze viral particles by sedimentation.

• VirologyNarrower topic: The virus is virology’s central subject, encompassing diverse agents with shared dependence on host cells.

• Stanley B. PrusinerCompared with: Prusiner argued that prions transmit infection without the nucleic-acid genome characteristic of viruses.

• John Howard NorthropNarrower topic: The crystallization of viruses raised questions about how noncellular agents relate to living systems.

• Viral diseaseNarrower topic: Viruses are the agents that cause viral diseases.

• Microbiological phenomenaBroader topic: Viruses interact with microbial hosts and influence microbial populations through infection.

• Non-cellular lifeBroader topic: Viruses are the best-known entities whose cellular status and living status are disputed.