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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
NPQ, CQ and RBV all dose-dependently inhibit CPE induced by HCoV-OC43 infection. Cells were mock infected or infected with virus in the presence of NPQ, CQ and RBV. Virus-produced CPE was observed by microscopy at 72 h post infection.