@reddust,
My knowledge about Vaccine and Vaccination is pretty bad. But I think my sister got this knowledge well! So hope this is a good reference to her as well. Actually this is a valuable series, lots of people don't know, coz for me this is an entirely a new domain of knowledge.
How did you know it that much? I think your profession was related to it! Keep it up my dear friend! People like this series! And it's pretty hard to write this series as well!

Cheers~