Human Coronavirus 229E Remains Infectious on Common Touch Surface Materials

Area of Science:

• Virology
• Materials Science
• Public Health

Background:

• Respiratory viruses, including coronaviruses like 229E, pose a significant global health threat.
• Zoonotic coronaviruses causing Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS) are of increasing concern.
• Human coronavirus 229E can persist on common surfaces for extended periods, creating a risk of indirect transmission.

Purpose of the Study:

• To investigate the persistence of human coronavirus 229E on various nonbiocidal surfaces.
• To evaluate the efficacy of copper and copper alloy surfaces in inactivating human coronavirus 229E.
• To understand the mechanisms by which copper alloys inactivate coronaviruses.

Main Methods:

• Human coronavirus 229E was cultured and applied to common surface materials (PTFE, PVC, glass, steel, etc.).
• Viral infectivity was assessed after defined periods on these surfaces.
• The effect of copper and copper alloy surfaces on viral integrity (RNA, morphology) was examined.

Main Results:

• Human coronavirus 229E remained infectious on nonbiocidal surfaces for at least 5 days.
• Copper and copper alloy surfaces rapidly inactivated the virus within minutes.
• Copper exposure led to viral RNA destruction and irreversible damage to viral structure, including envelope disintegration.

Conclusions:

• Copper alloy surfaces demonstrate potent antiviral properties against human coronavirus 229E.
• The rapid inactivation mechanism involves viral RNA degradation and structural damage.
• Incorporating copper alloys into public spaces could mitigate respiratory virus transmission from contaminated surfaces.