Because they were using the crappy Chinese vaccine.
The crappy Pfizer vaccine is the one most associated with myocarditis, clotting and bleeding issues.
The epidemic is one of low immunity. Raise vitD blood levels or stay home. No vaccine is needed.
At least the crappy CCP vaccines are not using expiremental novel techniques that have no safety track record.
Last I checked all of the vaccines authorized in China are conventional whole-virus vaccines. For some reason they chose not to make gene therapy based vaccines.
I wonder if they know something we don’t know?