April 5, 2021 There are a dozen Covid-19 vaccines that healthcare professionals are administering worldwide, and all of them require needles. That’s not necessarily a bad thing: Shots with modern, single-use needles have worked for inoculations since the 1960s. They’re easy for manufacturers to prepare in standardized vials that any needle can penetrate and deliver into a willing arm. And at this point, they’re common enough that most countries have the facilities, supplies, and healthcare providers available to store and administer them—and if not, it’s easy for aid organizations to step in and offer support. But it doesn’t mean that shots are the