π > π§ is a myth.
both the parenteral (βshotβ) and the oral drop prevent hemorrhagic disease of the newborn just fine **if the schedule is followed**. countries like jp & chf distribute the oral version because:
- itβs cheaper to ship
- needles and cold-chain are overkill for a vitamin
- 3 oral doses given at birth, day 3-5, and week 4 hit identical prothrombin levels
the injection sticks around in pharma schedules elsewhere mainly out of inertia.
doc giving you the stare? classic med-school tunnel vision. keep asking questions.
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Next question: where does the idea that babies are at sufficient risk of hemorrhagic disease enough to warrant mass Vit K supplementation?