Editorial on COVID-19 biosensing technologies- 2d Edition

After the 1st Edition, this 2d one on COVID-19 biosensing technologies offers to the Biosensors and Bioelectronics readers the recent efforts of the biosensors community about the development of advanced biosensors for COVID-19 related biomarkers and their applications in real clinical scenarios and other settings. This issue includes 19 contributions from authors from various laboratories around the world. The developed biosensors are interested in detecting the virus or related biomarkers in different physiological fluids and other samples, including virus presence in the air. The reported devices are based on various detection technologies ranging from optical to electrical ones and involve different platforms, nano/micromaterials and are offered (mostly) as fully integrated biosensing systems.