Add details on vaccine type

[mheadd]

Vaccine strains - (e.g if there was a influenza pandemic different
locations might be offering different vaccines such as in 2009 with H1N1. I
believe current vaccines offer H3N2 & H1N1)

Age group - (different types of vaccinations are recommended for different
age groups - denoting the availability, children, adults, seniors)

Type - (e.g Live attenduated (nasal spray), trivalent inactivated
(injected) and thermisal free version of the inactivated)

[Ace1976]

#17