Retailer stores and supermarkets are the most popular places to buy stuff and daily essentials until it is hit badly by COVID-19. The spread of COVID-19 has left both essential and non-essential retail businesses in panic. All retail stores have the traditional model with an air-conditioned space with lots of items and no windows, having high occupancy that make it a most suitable environment for infections to grow and circulate. In crowded marts/stores, poor air ventilation or sick building syn
