This week, MMWR published five reports. One describes four ethical principles that will guide decision-making on how COVID-19 vaccines will be allocated once vaccines are authorized or approved. The second report describes trends in new cases of COVID-19 in Kansas counties with and without mask mandates. The third report details a COVID-19 outbreak investigation in Minnesota following a motorcycle rally in South Dakota. The fourth report highlights how the COVID-19 pandemic may be negatively affecting hospital maternity care practices supporting breastfeeding. The last report looks at how healthcare workers with antibodies against COVID-19 had a decline in antibody levels over time.