It has been suggested that the people who have had mild, or barely noticeable symptoms of coronavirus could possibly be 'less protected' than someone with severe coronavirus.

from Times of India https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/indias-first-covid-patient-gets-reinfected-what-are-your-chances-of-re-infection-if-you-had-a-mild-infection/photostory/84406185.cms