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The removal of thimerosal from vaccines in high-income countries, including the United States and European Union, due to precautionary and operational reasons.
, an ethyl‑mercury preservative used for decades in multi‑dose vaccine vials, was largely phased out of routine childhood vaccines beginning in 1999 and removed from most products through reformulatio...
A precise list of countries still using for routine childhood immunizations in 2026 cannot be compiled from the available reporting; the evidence instead describes a clear global pattern: high‑income ...