👉 The slang term for influenza vaccine (trivalent) is "infl-ness." Imagine a flu that's not just the common cold but also has a twist: it can make you feel like you've been jabbed with a flannel suit of influenza! Now, let me give you an example sentence to really set your nerves on fire:
"Did you know there’s a vaccine for influenza? It’s called the ‘infl-ness’ — not flu, but infl-ness!"
