I don't have a link, but I remember reading elsewhere that with other coronaviruses (many cold viruses are in this category), it's thought possible to be reinfe

I don't have a link, but I remember reading elsewhere that with other coronaviruses (many cold viruses are in this category), it's thought possible to be reinfected after a while, especially if the symptoms are mild. The worse the symptoms, the stronger and longer lasting the immune response tends to be, which reduces chance of reinfection. Edit: this may be relevant https://www.npr.org/sections/goatsandsoda/2020/03/20/819038431/do-you-get-immunity-after-recovering-from-a-case-of-coronavirus https://www.npr.org/sections/goatsandsoda/2020/03/20/8190384... > Researchers do know that reinfection is an issue with the four seasonal coronaviruses that cause about 10 to 30% of common colds. These coronaviruses seem to be able to sicken people again and again, even though people have been exposed to them since childhood.