Before revision:  Lastly, we explain how the NNLAD can be used for group testing in the recent COVID-19 crisis and why contamination of specimens may be modeled as peaky noise, which favors \ell_1 based data fidelity terms .
After revision:  Lastly, we explain how the NNLAD can be used for viral detection in the recent COVID-19 crisis and why contamination of specimens may be modeled as peaky noise, which favors \ell_1 based data fidelity terms .