Another benefit of using open standards is that they offer interoperable applications that facilitate access to data and reusability. A Web client was deployed to consume data for the OGC STA provided by the IoCT platform. The OGC STA offers easy and agile access to sensor data using IoT paradigms. Moreover, the OGC IndoorGML allows for the aggregation of various cameras and contact tracing systems that can work together in a common indoor risk model and exchange various data within the space model for risk calculations. The OGC IndoorGML model can be used for various trajectory mining as well. The IoCT can be used for person-to-place interactions in order to identify those who may have been in close contact with an infected person, or with a virus-contaminated place. Moreover, the proposed system will inform people to take appropriate actions such as cleaning, social distancing, testing, isolation, or choosing safe pathways and locations. This paper improves both the quality and speed of pandemic emergency response by enabling IoT system interoperability and unlocking necessary information for real-time decision making, as well as accelerating new application development that is interoperable, scalable, and extensible.