CAPT MJ, I love those air gun injectors for the masses--but it is overwhelming for some teenagers to get so many shots--and publicly/under pressure I think it upped the amount of Syncope/Fainting, which happens in somethng less than 4% of teenager--figure 1200 kids, that is up to 40 fainters--do it more than once...I can see where the academies are like, "Here is the list, bring your shot record"--to save themselves the trouble and the kids the pain and embarrassment/interruption to training. I will have to look at why we don't use the air guns any longer--or it is just me, that I am not in places where they are used. Let me check...
OK...just checked the "jet injectors" were done away with in the early 2000s. Perceptions of risk of HIV, Hep B and Hep C... Here is an 'Ask the Mayo Clinic' on it:
http://www.seattlepi.com/lifestyle/...o-Clinic-Whatever-happened-to-jet-1293851.php