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Ultrasound can push vaccines into the body without needles
(www.newscientist.com)
This is a most excellent place for technology news and articles.
In other news, conservatives have introduced a bill to outlaw ultrasound machines.
Since vaginal ultrasound is how they detect a "fetal heartbeat" at 6 weeks (the heart isn't yet formed or pushing any blood, but there's an electronic pulse) at which point abortion is illegal in many states, that might be a good thing.
Although, as ultrasound is also how my overdue fetus was diagnosed with the umbilical cord wrapped 3x around the neck, leading to a quick C-section and healthy baby, I would rather keep the ultrasound machines and lose the lunatics.
They don't care about women who are considering abortion. I'd be more worried that they'd implement a less reliable test.