Immunity means that the immune system won the battle and killed the virus, and develop tools to kill it so you won't get sick again. So, not impossible, but ver

Immunity means that the immune system won the battle and killed the virus, and develop tools to kill it so you won't get sick again. So, not impossible, but very unlikely. Maybe this virus can hide itself like HIV and burst out regularly to test the waters? Very unlikely but as I said, not absolutely completely and utterly impossible.