The novel coronavirus outbreak has affected over 177 million people in around 218 countries and Territories. Covid-19 is life-threatening for the elderly and for those with chronic health conditions. This has set out a state of panic where people need to constantly monitor their health. The objective of this paper is to review the various sensor components, filtering algorithms, classification techniques, existing methods and technologies that play an important role in developing a safe remote health monitoring device. Comparison of sensor devices is done to understand the features of available products in the market. An extensive survey of ECG monitoring, lung acoustic signals and how COVID-19 affects this vital signature, thermal sensors, and pulse oximeters are presented. The need for a device in this situation to cater to the health issues of the people is necessary.