Just a normal attack vector for this board. They come and go according to seeds planted elsewhere, I wouldn't let it bother you.
Aint it amazing how clearvoyant anons are becoming. I do beleive we predicted a year ago they would be talking about boosters every few months as the only means to stay compliant.
Speaking of vax compliance
This is how they normalize it. Happening at a checkpoint near you. Locally in the country where I live they are starting this shit where they need proof of vaccine if you are driving between governing districts. Despite having laws against this kind of coersion, but they make life difficult enough that people will just take these small steps to be hassled less by the cops.
https://www.zerohedge.com/geopolitical/think-carefully-about-accepting-concept-vaccine-passports