Diagnostics and Immunology of Viral Infections

The field of viral diagnostics has evolved from conventional culture methods and basic serological tests to encompass high-resolution molecular assays and sophisticated immunoprofiling techniques. Core to this evolution is an improved understanding of host immune mechanisms, spanning innate pattern recognition, the kinetics of neutralising antibody responses and T-cell-mediated immunity. Nucleic acid amplification methods now detect viral genomes at ultra-low copy numbers, facilitating rapid identification of emerging pathogens. Concurrently, serological assays map past exposures and gauge protective immunity by measuring antibody classes directed against specific viral antigens. Integration of microfluidics, biosensors and portable platforms has decentralised testing, enabling point-of-care deployment crucial for outbreak control. Immunological insights into antigen presentation and memory B-cell maturation are informing next-generation vaccine design and monoclonal antibody therapies. These advances collectively reinforce global surveillance infrastructure and refine clinical management, from early detection of asymptomatic cases to evaluation of community-level immunity.

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Diagnostics and Immunology of Viral Infections publication trend

The graph below shows the total number of articles in diagnostics and immunology of viral infections across all publications each year (not limited to Nature Index journals).

Technical terms

Reverse transcriptase polymerase chain reaction (RT-PCR): A molecular technique that converts viral RNA into DNA and amplifies specific sequences to detect low levels of virus.

Enzyme-linked immunosorbent assay (ELISA): A plate-based assay using enzyme-conjugated antibodies or antigens to quantify target molecules in a sample.

Lateral flow immunoassay: A rapid point-of-care test in which labelled antibodies capture analytes on a membrane strip, yielding visible results without specialised instrumentation.

Receptor-binding domain (RBD): The region of a viral surface protein that engages the host cell receptor and is a primary target for neutralising antibodies.

Neutrophil-to-lymphocyte ratio (NLR): A calculated value comparing neutrophil and lymphocyte counts in blood, used as a marker of systemic inflammation and infection severity.

References

1. Routine blood parameters are helpful for early identification of influenza infection in children. BMC Infectious Diseases (2020).
2. An RBD-Based Diagnostic Method Useful for the Surveillance of Protective Immunity against SARS-CoV-2 in the Population. Diagnostics (2022).
3. Comparative evaluation of ten lateral flow immunoassays to detect SARS-CoV-2 antibodies. Wellcome Open Research (2021).