It's worse than thimerosal. One, not all vaccines are made equally. Some are far worse than others. Two, lab conditions are great when designing a vaccine, but industrial scale production makes it impossible to to produce lab quality vaccines en masse. Vaccine manufacturers also keep their facilities secret, so independent groups have verified contamination of many types across many different vaccines. Heavy metals. Pollen. Dust. Independent analysis is limited to testing vaccines, not the facilities. Furthermore the COVID vax, in particular, was originally designed normally. Dead S spikes and virus particles your body learns to fight. China and Russia both mass distribute this type of vaccine, but sell their own mRNA vaccines to other countries. Sputnik, the Russians call theirs. The Chinese have several mRNA variants, but the right people are getting traditional coronavirus vaccines while everyone else gets... whatever the hell they're handing out.