SARS VirusSevere Acute Respiratory SyndromeSpike Glycoprotein, CoronavirusAntibodies, ViralCoronavirusCoronavirus 229E, HumanCoronavirus InfectionsCoronavirus NL63, HumanNucleocapsid ProteinsPorcine Respiratory CoronavirusGranulosa Cell TumorQuarantineCommunicable Diseases, EmergingChiropteraDisease OutbreaksViral Envelope ProteinsInfectious Disease Transmission, Patient-to-ProfessionalCoronavirus OC43, HumanVero CellsPatient IsolationCoronaviridae InfectionsHong KongCercopithecus aethiopsMembrane GlycoproteinsCoronaviridaeViral VaccinesMolecular Sequence DataSingapore