AUTHOR=Boucher Patrice , Boucher Roger TITLE=Improving Non-specific Immunity to Coronavirus Disease (COVID-19) by the Novelty, Diversity, and Quantity of Antigen JOURNAL=Frontiers in Public Health VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2020.00393 DOI=10.3389/fpubh.2020.00393 ISSN=2296-2565