I (and my 3 siblings and great niece) tried vaxed, and vaxxed in the 7xm Excavated game, and it wasn't accepted. I looked it up in a couple of dictionaries and it's not there. Most of the internet search results appear to be about some US film linking vaccinations to autism (sci-fi?), but there are a fair number of newspaper articles from Aust, NZ, Singapore, UK, US, and quotes even from Joe Biden using vaxxed.
Vaxxed or vexed: What will life for the unvaccinated be like in ...
https://www.straitstimes.com › life › vaxxed-or-vexed-
Office tensions rise between the vaccinated and unvaccinated
13 Sept 2021 — Dividing respondents into two camps — the "vexed vaxxed" and "unnerved
https://www.cnbc.com › 2021/09/13 › office-tensions-ri...
Vaxed, waxed, but definitely not relaxed - The Washington Post
30 July 2021 — Vaxxed, waxed, but definitely not relaxed. Story continues below
https://www.washingtonpost.com › style › 2021/07/29
Fully Vaxxed? Get Rewarded - ADF Consumer Centre
https://adfconsumer.gov.au › fully-vaxed-get-rewarded
28 July 2021 — “If you've been fully vaccinated, you no longer need to wear a mask,” the president declared. “It's vaxxed or masked.”.
All Vaxxed Up - Americast - BBC
https://www.bbc.co.uk › BBC News › Americast
A new word - and common?