EMA, the EU's equivalent of the US FDA, the agency responsible to regulation and assessment of medical drugs and devices within the EU, has very politely and obliquely stated that, without clear evidence indicating the efficacy of repeatably jabbing people with booster shots, the strategy seems useless and rather risky. Which I guess makes them a bunch of anivaxxers.
Wait for the EMA to be censored by Facebook, Twitter, et al.
References
Repeat COVID-19 Vaccine Booster Shots Trigger Regulator Warning About Immune-System Risks
Mimi Nguyen Ly, The Epoch Times, 12 January 2022