SARS VirusSevere Acute Respiratory SyndromeSpike Glycoprotein, CoronavirusAntibodies, ViralCoronavirusCoronavirus 229E, HumanCoronavirus InfectionsCoronavirus NL63, HumanSequence Analysis, DNANucleocapsid ProteinsSpecies SpecificityDisease OutbreaksRNA, Ribosomal, 16SPorcine Respiratory CoronavirusGranulosa Cell TumorMolecular Sequence DataMice, Inbred StrainsCommunicable Diseases, EmergingDNA, RibosomalBacterial Typing TechniquesQuarantineViral Envelope ProteinsChiropteraGenes, BacterialAmino Acid SequenceEscherichia coliVirulenceCoronavirus OC43, HumanInfectious Disease Transmission, Patient-to-ProfessionalMutationVero CellsDNA, BacterialMicrobial Sensitivity TestsAnti-Bacterial AgentsPhylogenyCercopithecus aethiopsGenome, ViralHong KongPhenotypeViral VaccinesPolymerase Chain ReactionSerotypingCulture MediaPlasmidsBase CompositionPatient IsolationRNA, ViralCoronaviridae InfectionsMembrane GlycoproteinsGenes, rRNACoronaviridaeDrug Resistance, MicrobialGene Expression Regulation, BacterialGenotypeBase SequenceGenome, BacterialFecesSoil MicrobiologyViral ProteinsSequence AlignmentNucleic Acid HybridizationMurine hepatitis virusReproducibility of ResultsRNA, BacterialGenetic VariationVirus ReplicationReverse Transcriptase Polymerase Chain ReactionCell LineSingaporeCloning, MolecularPersonnel, HospitalCluster Analysis