Your DNA communicates via light (yet another frequency, BTW). At New Zealand, there are 64,000 hospital births annually. Every baby gets a pin prick in the heel; blood is typed and DNA is obtained. If you wanna work at McDonald's as a security guard, then a urinalysis is required. Your DNA from that piss test is on-sold - regardless whether you get the job or not. Wanna find out who your long-lost relatives are? Just submit your DNA sample to the genealogy web site. When arrested for an imprisonable offense, a DNA swab is mandatory. Where do you think all that DNA goes?
So they already have a large chunk of the world's DNA data banked.
What better way to gain access to the temple (i.e. you) than through injections (and also food, water, and air)?
The "other purpose" is simple: Satan comes to steal, to kill, to destroy. So there's your simple answer. The agenda has never changed. As the prince of the power/authority of the air, he has his wireless RF technology and nanotechnology working together.
The perp's (i.e. perpetrators, Satan's minions) could kill ALL OF US, RIGHT NOW, but don't, because Satan wants to lord power over us; he wants to be worshipped. Recall that he wants to be like the Most High. Like a cat who caught a mouse, it's all about the game.
So yes, Satan's minions DO want to "to kill people with the vaccine," and they are doing so presently, but for Satan, the ultimate plan is to go all the way (BECAUSE SCRIPTURE SAYS SO) - and he will, in God's timing.
Recall also that God always preserves a righteous remnant. You want to be one of those...