This week's episode covers four MMWR COVID-19 reports. The first describes the rise of new variants of the virus that causes COVID-19. The second report highlights U.S. vaccination coverage data among kindergarteners during the 2019‒2020 school year. The third report evaluates the performance of an antigen test and highlights how antigen tests can be an important tool in an overall community testing strategy. The last report describes baseline health department data metrics for assessing case investigation and contact tracing efforts.