organization [4], in particular regarding the supply of personal protective equipment (PPE) to health care personnel in regions/countries where the infection rate was especially large. From the very beginning, Spain was one of the countries badly affected by COVID-19 with 213,000 confirmed cases (data updated on 1 May 2020), 24,543 deaths and 112,000 recovered patients (National Institute of Statistics (Spain) [[http://ine.es](http://ine.es)]([http://ine.es](http://ine.es))). However, the distribution was not homogeneous, and some regions concentrated a rather large fraction of the overall cases, such as the case of Madrid, Catalonia, or Castilla-La Mancha. As of 1 May, Castilla-La Mancha exhibited one of the highest death rates per 100,000 inhabitants in Spain (Source: encecovid.isciii.es/covid19/#documentaci%C3%B3n-y-datos) (see Figure 1). The reasons behind the massive contagion have not been fully confirmed, although one may highlight: (i) the proximity to the capital city, Madrid (the epicenter of the virus in Spain), and (ii) heavy traffic, some of the most important road links in Spain cross the region. Castilla-La Mancha was not prepared for such an overwhelming situation and certain strategies to protect the population and prevent the virus expansion, such as the acquisition and distribution of PPEs, turned extremely difficult. This was a major issue [5], as their effective use is essential to prevent the spread of the disease between health care personnel and patients [6]. Shortage of PPEs was an unacceptable situation and implied a major risk of infection in hospitals. The supply of PPEs in Europe largely depends on external markets, mainly China, which were soon collapsed as the cases grew in Europe and the US, leading to delivery dates of up to several weeks. As the virus rapidly expanded, such waiting periods were not acceptable and the situation in hospitals became unsustainable. Under such an emergency context, and considering that the manufacturing industry requires some time to redirect their production system to supply validated material at mass scale, several social movements and volunteered assistance promoted through digital media emerged [7,8]. These social movements are typically coordinated by groups of people aware of the critical situation searching for organization models to perform collective actions [9,10]. In times of crisis, social movements benefit from digital media to gather more people, manage activities and promote  
Figure 1: Number of cumulative deaths of COVID-19. Castilla-La Mancha was the third region with more COVID-19 cases in Spain. new goals, hence solutions can be offered to existing problems [11]. Unfortunately, most of these social movements perform unstructured actions and interactions among network members, with no integrated control [12; 13; 14]. Therefore, organization models are required to successfully perform collective actions [15; 16]. One of these social movements was initiated by the University of Castilla-La Mancha (UCLM) to support the regional healthcare system in three priority areas: (a) design of low-cost ventilators for collapsed ICUs, (b) 3D printing of PPEs, and finally (c) diagnostic testing of the virus via PCR. Furthermore, the UCLM launched a crowdfunding campaign to support all the activities. On the first day, the UCLM gathered 57,000 euros in donations and, to date, the accumulated amount exceeds one million euros. In the work presented herein, we focus on the 3D printing of PPEs to report a clear example of the impact of improved organization models upon the manufacturing and distribution of PPEs in Castilla-La Mancha (Spain). The transition from a centralized traditional system to a decentralized system (supported by a custom-developed information system) resulted in a dramatic improvement in both the manufacturing process and distribution, reducing the response times to reach the end-users.