## 3 Results--Systematic Literature Review
### Common Classification Fields
#### 3.2.2 Industrial Sector  
Figure 3 shows the distribution of papers by industry field. The logistics sector records the largest number of publications (20 out of 101, 19.8% of the sample). This result can be attributed to the broad impact of the COVID-19 pandemic on that sector, including government restrictions imposed to contain the spread of the virus, but also the increased need for logistics activities due, for instance, to the growth of the e-commerce market [16]. The research query used in this study also expressly mentioned logistics and SC processes. The logistics sector has experienced drastic uncertainties and changes in the operating environment and this has affected companies differently, based on their position and overall view of the market [61].  
The food and agri-food sectors were examined separately for a deeper and more effective analysis of the related outcomes. It is notable that the total number of studies relating to either food or the agri-food sectors covers one-third of the full sample of papers. In the agri-food sector, various studies regarding SC vulnerability [62] and risk management [63] have emerged. Researchers have pointed out that adaptability has enabled supply chains to seize new opportunities [64; 65; 66]. Food and agri-food sectors have been greatly analyzed in term of food insecurity, i.e., the problem of mobility blockage and food shortages [67; 68; 69; 70].  
The COVID-19 pandemic has greatly affected manufacturing activities worldwide, causing major issues for over 75% of the global production. This situation occurred mainly because of the closure of various factories, which prompted people to make frantic purchases and accumulate excessive stocks [71]. Additionally, shifting customer choices (e.g., privileging online shopping over in-store shopping) brought up new and unexpected issues about how connected worldwide supply networks are and about the general way of overseeing SCs [72]. In the manufacturing sector, as well as in the industrial sector, the increasing focus on sustainability is emphasized, with a push toward the adoption of greener practices, especially by small- and medium-sized enterprises [73]. It also highlights the importance of measuring resilience strategies of manufacturing SCs, especially in view of recovery scenarios after critical events such as the COVID-19 pandemic [74].  
Research activities in the healthcare sector have examined pharmaceutical SCs [75], [76] and the risks in health delivery. In these contexts, there are typically four types of SC risks: physical, financial, information, and relational [75]. Physical risks focus on transporting goods from the manufacturer to where customers can access them. Financial risks concern the flow of money through the SC, while information risks focus on using electronic systems for material and payment during operations among SC players. Finally, relational risk concerns the connections between producers, transporters, and customers [76]. In the light of this classification, healthcare SC risks can have various sources; for instance, risks could be generated by scarcity of medical supplies, unpredictable customer demand, fake medicines, outdated technology, worker strikes, unreliable power, poor infrastructure, long supply processes, or fluctuating fuel and transportation costs. By understanding where and how these risks originate, healthcare systems can work to reduce their impact and build more resilient networks [77]. The pharmaceutical sector has been greatly impacted by COVID-19, due to reduced production capacity, domestic stocks, and export bans [78]. Shortage of some essential medicines in the pandemic period was highlighted as a key issue, emphasizing the need for establishing effective supply systems [79] and for ensuring the safe transportation of drugs from the manufacturer to end users.