Even though the number of individuals diagnosed with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is high, serological studies have revealed that the actual number of infected persons is even higher. With the ongoing worldwide mass vaccination program and the increased number of SARS-CoV-2 recovered individuals, scientists believe that it is important to understand the risk of reinfection. This would be immensely helpful for modeling the coronavirus disease 2019 (COVID-19) pandemic, which could aid in formulating vaccination strategies and predicting the onset of herd immunity.
