Upper respiratory infections (URIs) are among the most common illnesses affecting people across the globe. These infections can be caused by a variety of viruses and bacteria, leading to symptoms such as coughing, sneezing, sore throat, and a runny nose. Given their prevalence, it’s crucial to understand how they spread and the duration of their contagiousness. Contagion is a significant concern when it comes to respiratory infections, particularly because they can easily be transmitted from one individual to another through respiratory droplets. This is exacerbated in crowded settings where close contact is common. The understanding of how long a person remains contagious can help in managing the infection’s spread, especially…