Nanotechnology offers a number of solutions to fight viruses, both outside and inside the host, and several nanotechnology-based platforms have already been successful in preclinical studies to counter several human viral pathogens such as HIV, human papilloma virus, herpes simplex, and respiratory viruses.32−35 Nanotechnology-based approaches should be leveraged to help the fight against COVID-19 as well as any future pandemics, in a number of ways, including (i) novel vaccines and drugs, where nanomaterials can be leveraged for direct delivery of broad-spectrum antivirals and to support targeted therapies to the lungs; (ii) highly specific, rapid, and sensitive tests to detect infection or to detect immunity (serological tests); (iii) superfine filters for face masks or blood filtering; (iv) novel surfaces or surface coatings that are resistant to viral adhesion and can inactivate the virus; and (v) the improvement of tools for contact tracing (Figure 2).