Maybe call it a "drug" not "vaccine" coz that's not how vaccines work. Like who takes "vaccine" in tablet form daily for 3 months??? Is becoming a vampire even an illness? Maybe it should have stayed on the supernatural side because suddenly inserting a scifi aspect into this is really out of place.
If this "vaccine" is distributed around the world then does that mean the head of medical industries around the world is infested by vampires under the command of Yohan? WHO approved this? They have research papers detailed to proved their claims? Where did they get the participants in the clinical trial? How did they perform the clinical trial? Was this approved the the medical board of ethics?
Being a vampire is a disease, possibly a pandemic, yet there was not a single mention of its pathophysiology throughout the series?
Why is there not a single person in doubt or opposing a "vaccine"?
There is no discussion as to how the vaccine works, its efficacy, and possible side effects, yet so many people want it???
Ok, this was really good until this part. Hopefully s2 can redeem it.