AUTHOR=Clark Nicole F. , Taylor-Robinson Andrew W. TITLE=COVID-19 Therapy: Could a Copper Derivative of Chlorophyll a Be Used to Treat Lymphopenia Associated With Severe Symptoms of SARS-CoV-2 Infection? JOURNAL=Frontiers in Medicine VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2021.620175 DOI=10.3389/fmed.2021.620175 ISSN=2296-858X