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epa08319733 An undated handout image captured and color-enhanced at the National Institute of Allergy and Infectious Diseases (NIAID) Integrated Research Facility (IRF) in Fort Detrick, Maryland, USA and made available by the National Institutes of Health (NIH) shows a colorized scanning electron micrograph of an apoptotic cell (green) infected with SARS-COV-2 virus particles (yellow), isolated from a patient sample (issued 24 March 2020). The novel coronavirus SARS-COV-2, which causes the Covid-19 disease, has been recognized as a pandemic by the World Health Organization (WHO) on 11 March 2020. EPA/NIAID/NATIONAL INSTITUTES OF HEALTH HANDOUT HANDOUT EDITORIAL USE ONLY/NO SALES