As a proven microbe-killer, copper deserves a starring role in hospitals, especially post-COVID-19.
Research from March revealed that SARS-CoV-2, the virus behind the COVID-19 pandemic, survives up to four hours on copper, 24 hours on cardboard, and three days on plastic or stainless steel (with viral load sharply declining after 72 hours). Microbiology expert Bill Keevil from the University of Southampton (UK) was surprised it lasted that long on copper.
In Keevil's lab, pathogens like Legionella pneumophila (causing Legionnaires' disease), methicillin-resistant Staphylococcus aureus (MRSA), MERS coronavirus, and H1N1 swine flu virus all perish within minutes on copper surfaces.
Humanity has long harnessed copper's antimicrobial properties. The Ebers Papyrus, a 16th-century BCE medical text from Amenhotep I's era, records its use as a disinfectant. By 1600 BCE, Chinese healers treated heart, gastric, and bladder issues with copper coins. Phoenicians inserted bronze (copper alloy) sword fragments into wounds at sea to fend off infections. Generations of mothers noted fewer diarrhea cases in children drinking from copper vessels.
“Heavy metals like gold and silver are antibacterial, but copper's unique atomic structure delivers extra punch,” says Bill Keevil. “Copper's free electron in its outer shell drives redox reactions—making it an excellent conductor too.” This electron oxidizes pathogen molecules. “Silver and gold lack free electrons, so they're less effective,” he adds.
Copper ions also rupture microbial cell membranes, exposing DNA or RNA for direct attack and halting replication.
Michael G. Schmidt, microbiology professor at the Medical University of South Carolina (USA), has studied copper in healthcare settings for years.
A 43-month trial across three hospitals equipping copper alloys on bed rails, IV stands, and chair armrests saw 58% fewer hospital-acquired infections versus standard facilities.
In a two-year ICU study published this year, plastic surfaces exceeded risk thresholds in 90% of samples, while copper ones did so in just 9%.
Hospitals worldwide—from the US, France, Poland, Peru, to Chile—now use copper in faucets, door handles, and fixtures. UK researchers recently developed copper nanoparticle-infused scrubs to curb infections.
Budget constraints slow adoption, but rising health awareness may accelerate it, with innovators offering cost-effective solutions.
