Variants Vaccine Development Genomic Sequencing Laboratory Research COVID-19 Variants Genomics Genomic Variants Genomic Analysis Gain-of-Function Research Animal Reservoirs Infectious Diseases Antibodies Variant Classification Covid-19 Variants Origins of Viruses Research Funding Origin Theories Research Methods Variant Research Lab Leak Theory Omicron Variant Mutation Variant Monitoring Investigations Research Variant Tracking Omicron Variants Airborne Transmission Transmission Dynamics Viral Pathogenesis Virus Mutations Mutations Infection Rates Genomic Surveillance Variants of Concern