A Survey of Location-Allocation of Points of Dispensing During Public Health Emergencies.

Public health emergencies such as disease outbreaks and bioterrorism attacks require immediate response to ensure the safety and well-being of the affected community and prevent the further spread of infection. The standard method to increase the efficiency of mass dispensing during health emergencies is to create emergency points called points of dispensing (PODs). PODs are sites for distributing medical services such as vaccines or drugs to the affected population within a specific time constraint. These PODs need to be sited in optimal locations and have people (demand points) assigned to them simultaneously; this is known as the location-allocation problem. PODs may need to be selected to serve the entire population (full allocation) or different priority or needs groups (partial allocation). Several previous studies have focused on location problems in different application domains, including healthcare. However, some of these studies focused on healthcare facility location problems without specifying location-allocation problems or the exact domain. This study presents a survey of the PODs location-allocation problem during public health emergencies. This survey aims to review and analyse the existing models for PODs location-allocation during public health emergencies based on full and partial demand points allocation. Moreover, it compares existing models based on their key features, strengths, and limitations. The challenges and future research directions for PODs location-allocation models are also discussed. The results of this survey demonstrated a necessity to develop a variety of techniques to analyse, define and meet the demand of particular groups. It also proved essential that models be developed for different countries, including accounting for variations in population size and density. Moreover, the model constraints, such as those relating to time or prioritizing certain groups, need to be considered in the solution. Finally, additional comparative studies are required to clarify which methods or models are adequate based on predefined criteria.

Extreme heat at outdoor COVID-19 vaccination sites.

Extreme heat is an increasing climate risk due to climate change and the urban heat island (UHI) effect and can jeopardize points of dispensing (PODs) for COVID-19 vaccination distribution and broader public health emergency preparedness (PHEP) response operations. These PODs were often located on large parking lot sites with high heat severity and did not take heat mitigation or management strategies into account for unacclimated workers and volunteers. To investigate the personal heat exposure of workers, volunteers, and clients at three PODs in Tucson, Arizona, we collected ambient air temperatures, wet bulb globe temperatures (WBGT), surface temperatures, and thermal images. We also made qualitative observations and compared data against daily meteorological records. Ambient air temperatures at all three PODs exceeded the meteorological recorded high. WBGT on average were 8°F (4.4 °C) higher in full sun locations than shaded locations such as tents. Evaporative cooling decreased ambient air temperatures by 2°F (1.2 °C) when placed one per tent, but decreased ambient air temperatures by 7°F (3.9 °C) when placed en masse in a larger tent. Vehicle surface temperatures exceeded recommended safe limits of 140°F (60 °C) at all three sites, with a maximum temperature recorded at 170.9°F (77.2 °C). Public health professionals should consider heat resilience, including heat mitigation and management measures, in POD and PHEP response operations to reduce exposure. This includes considering the UHI effect in the siting of PODs, applying heat mitigation strategies in the design of PODs such as the adaptive use of solar panels for shading, and improving heat safety guidance for workers and volunteers.

Approaches, Successes, and Challenges in Recruiting Closed Points of Dispensing Sites: A Qualitative Study.

Closed points of dispensing (PODs) are an essential component of local public health preparedness programs because most local public health agencies lack the infrastructure to distribute medical countermeasures to all community members in a short period of time through open PODs alone. However, no study has examined closed POD recruitment strategies or approaches to determine best practices, such as how to select or recruit an agency, group, or business to become a closed POD site once a potential partner has been identified. We conducted qualitative interviews with US disaster planners to identify their approaches and challenges to recruiting closed POD sites. In total, 16 disaster planners participated. Recruitment considerations related to selecting sites, paperwork needed, and challenges faced in recruiting closed POD sites. Important selection criteria for sites included size, agencies or businesses with vulnerable or confined populations who lack access or ability to get to or through open POD sites, and critical infrastructure organizations. Major challenges to recruitment included difficulty convincing sites of closed POD importance, obstacles with recruiting sites that can administer mass vaccination, and fear of legal repercussions related to medical countermeasure dispensing or administration. Closed POD recruitment is a frequently challenging but highly necessary process both before and during the current pandemic. These recommendations can be used by other disaster planners intending to start or expand their closed POD network. Public health agencies should continue working toward improved distribution plans for medical countermeasures, both oral and vaccine, to minimize morbidity and mortality during mass casualty events.