That seems extreme to me. I mean you can only bite the ones that want your strain and then they are infected and you can not bite them anymore. It seems like it would take quite a few pandemic events to get 100.
Unless I am missing something? Maybe I just still do not understand how it all works.

I got that achievement the first year it was released. It's something that can be done in a year, maybe two if you're unlucky.

Always easier to have popular strains on hand. I did mine with Butterfly Bruise dealing.

I think your missing something. I thought that way too this Pan but you know what? right now I'm three away from it! If you use all your zom skins and keep at it while waiting its not that hard if you look on the right threads:)

Are there any threads for biting? I could not find anything. I even made a thread and only got 1 person to post on there. I randomly found 2 others on the forums after looking through kissing threads that had the bite link and they worked. Most of them say the person is not looking for my strain if they actually have the link. Maybe later in the week though. This is my only strain, it is my first Pandemic.

If you get the other stains that you like it might be easier to bite more people with more strains. This thread is looking for biters:Here

other skins to collect

yeah like others have said here, it's not nearly as bad as it seems :) I got most if not all of the bites done last year

Can I get more strains? Or do I have to wait until this one is complete? I am sorry I am asking so many questions, I am so lost,lol. I did find someone to bite on that thread though, so thank you!!

You're welcome:) Yes, each strain has stages and you have to wait for one to finish to get another.

Okay thank you so much ;)

I got the achievement! Thank you so much for all your help getting me on my way ;) I think it also helped having the Caterkiller strain,seemed to be a popular one.