Which scientific product recall in 2010 affected thousands of laboratories when it was discovered that a widely-used enzyme had been contaminated with bacterial DNA?

Product recalls aren't just for consumer goods! The scientific industry has had its share of notable recalls that impacted research worldwide. These incidents have shaped laboratory safety protocols, research methodologies, and quality control standards across the scientific community. Test your knowledge about some of the most significant scientific product recalls that changed how researchers approach their work.

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Thermo Fisher's Taq DNA Polymerase
Sigma-Aldrich's CRISPR-Cas9 kits
Merck's cell culture media
Agilent's mass spectrometry calibration standards