A virus variant went from 1% to 95% of cases in seven weeks
1% → 95% in 7 weeks
In late 2021, Omicron rapidly displaced other SARS-CoV-2 variants around the world. Its share of reported cases rose from roughly 1% to 95% in about seven weeks. When a new variant spreads more effectively than its competitors, even a small initial advantage can produce a dramatic change in which virus dominates.