Information about the pandemic is provided in the explanatory text.

weird, it doesn't mention plagues above in the mod; are we sure pandemics are part of this mod. Seems fishy

its a good mod in my opinion but the disasters are very op
Pandemics can raze cities that have less than 3-4 pop
which is extremely annoying to play with since imagine this scenario
You have a city that's bordering another civ
Lets say Alexander
Since Alexander is a aggressive civ he would of most likely declare war on you to get a that city bordering your
Well bucko
Enjoy this pandemic and oops
There goes your most productive town that can help you stand a chance
See the problem?
an idea for me is that
pandemics could lower population by 20-25% and prevent cities from building for a certain amount of turns (3-5 turns)

it is very compatible too

@fullautoSherman
Thanks for the comments.

amazing mod