Alien meteorites carried the virus, causing it to spread. The end of the world is coming, and in the face of biological and chemical disasters, all we can do is keep breathing and stay alive...
There is a 6-year age difference, and they are a middle-aged and aloof professor in the Department of Physical Education with a high IQ.
Ordinary people's way of survival in the apocalypse has no supernatural powers.
Purpose: It is better to save yourself than to save others