This book presents a collection of chapters on Covid-19 topics, with focus on the metabolomics and diagnosis. The chapters report on diagnostic tests for detection of SARC-CoV-2 virus and related proteins as well as post-Covid omics. This book covers Fourier-Transform Infrared spectroscopy and spectromicroscopy applied to Covid-19 studies and Carbon Nanomaterials as Covid-19 Electrochemical sensors. Moreover, the reader will find content on 3D printing for virus diagnosis, as well as organ-on-a-chip models for viral infection proteomics interaction.