Omicron, Delta, Alpha, and More: What To Know About the

Clues to Omicron Variant's U.S. Spread Include Test Samples, Sewage - WSJ

Alpha, Beta, Gamma, Delta, Omicron: COVID-19 Variants Explained

Genetic differentiation and diversity of SARS-CoV-2 Omicron variant in its early outbreak

Generation time of the alpha and delta SARS-CoV-2 variants: an epidemiological analysis - The Lancet Infectious Diseases

Frontiers Alpha, Beta, Delta, Omicron, and SARS-CoV-2 Breakthrough Cases: Defining Immunological Mechanisms for Vaccine Waning and Vaccine-Variant Mismatch

The spread of SARS-CoV-2 variant Omicron with the doubling time of 2.0–3.3 days can be explained by immune evasion

How Omicron Symptoms Differ From Delta, Past COVID-19 Variants: Charts

Climbing the ladder of infectiousness - by Eric Topol

Delta spike P681R mutation enhances SARS-CoV-2 fitness over Alpha variant - ScienceDirect