Vax is nicely versatile. As a noun, it’s just a vaccine or vaccination. As a verb, to vax means to vaccinate. If you’re opposed to vaccination, you’re anti-vax (an adjective), or an anti-vaxxer (another noun). If you’ve had two doses of a vaccine, you’re double-vaxxed (another adjective). And if you point your phone at yourself during or immediately before or after a vaccination, especially one against Covid-19, and then share it on social media, you’ve taken a vaxxie—a vaccination selfie.
