Therapeutic strategies that utilize antibiotics can be both ineffective and harmful to the natural gut flora. Instead, nanotechnology can be used not only to design intelligent functional foods and drugs to treat COVID-19 but also to serve as a delivery system. These drugs would be instrumental in combating illness prophylactically and during infection because they would “target problematic bacterial strains in the gastrointestinal tract and enhance its health by improving gut barriers against pathogens and inflammatory reagents and by providing the base for creating disruptive remedies based on microbiome engineering”.