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Since late 2019, the novel coronavirus (COVID-19) pandemic has caused considerable mortality worldwide. This pandemic raised concerns and provoked research on the diagnosis and treatment of viruses-based diseases. The accurate diagnosis of a virus requires high specificity and sensitivity. Piezoelectric sensors are analytical devices that work on mass-sensitivity-based micromechanical transducers. The change in the mass by the interaction between biological elements and the frequency is recorded by measuring the alternate current and voltage. In addition to diagnosis, antiviral intervention strategies for mitigating various viral diseases are required. Nanomaterials-based antiviral therapy is efficient, particularly with carbon/metal/metal oxide (organic/inorganic) nanoparticles. Metal/metal oxide nanoparticles, such as gold (Au), silver (Ag), copper (Cu), selenium (Se), zinc oxide (ZnO), magnesium oxide (MgO), carbon dots (CDs), and carbon quantum dots (CQDs), are promising candidates for antiviral therapy. This review discusses the piezoelectric sensors used to detect various viruses, including COVID-19, and the various organic and inorganic nanoparticles involved in the antiviral therapy.