Table 2.

Summary of current research works

Work and Year	Technologies	Research Objective	Comparison of recent research work with regard to:
Javaid et al. (2020) [10]	AI, IR 4.0	Managing COVID-19	An in depth review on the technologies of IR 4.0 to manage the pandemic stage.
Ndiaye et al. (2020) [11]	IoT, AI, Big data	Electronic health management system	A survey on the existing technologies such as, IoT, artificial intelligent to assist the health system in order to survive in this pandemic situation.
Ranaweera et al. (2020) [12]	5G, Multi access edge computing	Remote patient monitoring and without contact support to patient	A edge computing mechanism based on multi accessibility for providing treatment or health advice to COVID-19 affected patients remotely.
Abdel-Basset et al. (2020) [13]	Blockchain, IR 4.0, IoMT, 5G	Assist physicians to take quick actions to serve the patients.	Smart architecture to track the COVID-19 patients and manage PPE.
Garg et al. (2020) [14]	IoT, Blockchain	Development of a framework to minimize the outspread of the Covid 19	A framework on block chain’s trust mechanism and RFID based tracing system to track the movement of animals and humans to control the spread of this infection.
Singh et al. (2020) [15]	IoT	Prediction of an outbreak and screening patients remotely	An IoT based smart framework to fight in the pandemic situation in every aspect.
Otoom et al. (2020) [16]	IoT, machine learning, cloud architecture	Collecting and analyzing past record of patient affected by coronavirus	Collection of data for detection of COVID-19 patient at early stage using machine learning algorithms.
Kolhar et al. (2020) [17]	CNN, IoT, Edge and Cloud computing	Face detection mechanism to assist the imposing of mask	Implemented a three layer framework to detect the face of human to monitor the movement of human.
Rahman et al. (2020) [18]	IoT, web tool, m-health	Defend pandemic using benefits of IoT	The technological assessment to help the whole world to survive in this pandemic.
Marbouh et al. (2020) [19]	Blockchain, Ethereum	Secured tracking mechanism	A comprehensive review on the scopes and applications of the secured blockchain technology.
Tsang et al. (2021) [20]	IoT, Blockchain	Examining the layered architecture of BIoT	Nine broad categories of the combined Blockchain and IoT structure in the perspective of research and development that is actually the core part of any industry.
Xu et al. (2019) [21]	IoT, Industry 4.0, Cloud computing, Cyber-physical systems, and Big data	Highlighted the potential guideline for Industry 4.0 to obtain a fully autonomous system	Big data methods are being used to enhance the scalability and security of Industry 4.0. In addition, in industry 4.0, a connection between cyber-physical systems and big data being developed.
Aheleroff et al. (2021) [22]	IoT, Cloud computing, Industry 4.0	Identified appropriate Industry 4.0 technologies and a holistic reference framework to finish the most difficult Digital Twin-enabled applications	Establish a strong connection between Digital Twin capabilities as a service and mass personalization. Smart scheduled maintenance, real-time tracking, and remote control are among the additional resources available.