the endless pattern is a biohazard sign. 2019 coronavirus-ncov. an background.

2019 2019ncov affected agitation airborne apocalypse background biohazard bioterrorism book china coronavirusncov coronovirus crown deadly design disease educational emblem endless epidemic harmful health idea immunity infect infection infinite information isolated leaflet literature logo magazine medicine medicosocial microorganism multicellular pathogen pattern poster protection quarantine recommendation red risk seamless sign spread strain symbol symptom temperature threat vaccine virus warning web wuhan zombie