"Lessons Learned" is a series of publications that are a brief recounting of actual school emergencies and crises. This "Lessons Learned" issue focuses on an infectious disease incident, which resulted in the death of a student, closure of area schools and the operation of an on-site school vaccine clinic. The report highlights the critical need for creating, implementing and sustaining an all-hazards emergency management plan that includes a plan for infectious diseases. Infectious disease outbreaks can be unpredictable and can escalate quickly. Reducing the spread of the infectious disease requires collaboration among all partners, including the business community and media, to marshal the resources and expertise needed. An all-hazards emergency management plan should include processes for working with community partners, families and media to provide consistent, continuous messages and guidelines for social distancing and resources for families and the community. (Contains 1 footnote and 1 figure.) [This publication was produced by the Emergency Response and Crisis Management (ERCM) Technical Assistance (TA) Center and the U.S. Department of Education's Office of Safe and Drug-Free Schools (OSDFS). For Volume 2, Issue 2 of this series, see ED498521.]