text_1: People who have survived the COVID-19 coronavirus disease can become reinfected by the virus. 
text_2: A coronavirus infection’s going into a “dormant” stage and then re-emerging was another possibility for explaining the appearance of reinfection suggested by Dr. Philip M. Tierno, Clinical Professor of Microbiology and Pathology at at New York University: “Once you have the infection, it could remain dormant with minimal symptoms. And then you can get an exacerbation if it finds its way into the lungs.”