January 18th marked the first day Indiana had fully vaccinated residents. It was around the peak of the winter 2020 wave of COVID-19. There was a significant lull in cases through the end of July 2021, when the first delta wave hit. The first delta wave peaked in August, with a brief valley in October, before delta picked up again in December just as the omicron wave crashed into the state at the end of December. Single-day totals for cases peaked in January 2022 with nearly 19,000 Hoosiers testing positive for the virus. As quickly as omicron hit, it disappeared – having infected the folks it was going to infect over a very short time. Cases dropped to pandemic lows for most of spring 2022, before omicron variants BA.4 and BA.5 began driving cases back up. The difference between the size of the delta wave and this current wave is largely attributed to at-home testing, which isn't reported to the state. As a result, epidemiologists believe positive cases are likely exponentially higher than what is being reported on the state's dashboard. After a brief drop in October, cases have once again steadily climbed.