I think injections should be replaced with something non-invasive.

Honestly, I panic with the idea of being given a shot. Why? For the simple reason that it is painful. It depends on someone's pain threshold but for me needles are the worst. Given that we are in the modern age, scientist must come up with an apparatus to replace needles as a means of getting medicines into our system. Imagine if children will not cry anymore during vaccinations. This would make all our lives so much easier.