a "pandemic" is someone who falls under the ace spectrum towards the grey-ace side but they need a strong friendship before romantic feelings, but their romantic feelings can be for any gender and/or simply because of personality!
This is actually a pun for people who are Panromantic Demisexual!
A: Jess is identifying as a pandemic now!
b: A PANDEMIC???? LIKE THE SPANISH FLU???
a: No, they're panromantic demisexual!