(I assume they do not use anything sharp and don't have more than 3 ounces of vaccine!

)
US airports offer airside flu shots
Five major airports in the USA have begun offering flu vaccinations to travellers once they have gone past security checkpoints.
Similar services have previously been available for passengers prior to security checks, but research suggests many travellers do not take up the service because of fears they may miss their flights.
Now airports in Atlanta, Chicago, Denver, Newark and San Francisco have set up health stations past the security checkpoints.
http://www.passengerterminaltoday.co...hp?NewsID=2325