Currently, the COVID‐19 has directly affected the millions of humans
lives. The symptoms of the disease involving fever, malaise, chest
infection, and breathing difficulties, were identified, and its
existence is continuously becoming restructured. The World Health
Organization (WHO) had mentioned the wide diagnostics test besides
COVID-19 that would also assist medical facilities to recognize
infectious diseases as well as currently focusing efficiently on
preventing and afterward defeating this viral disease. The infection is
usually transmitted among human beings in direct contact, greatest
through the liquid bubbles generated through cough, sneeze, or speaking.
This paper reviews the COVID 19 pandemic, its history, current updates,
contact tracing applications, and use of emerging technologies like the
Internet of Things (IoT) and Blockchain for stopping the spreading and
provide service online to the patient from a distance.