Originally Posted by
WizardOfBoz
It looks like the virus particle activity goes to undetectable levels on plastic and stainless after 4 days, and cardboard after 2 days, copper after 1 day. The cardboard data were "noisier" than for other surfaces, and so the authors recommended caution in using those data.
From what profjmb has said, the bike is in a common storage area and there is a concern that people may have been in contact with it. That means that any contaminant would be on the bare metal. I would suspect that the titanium dioxide surface isn’t conducive to viral growth, especially if exposed to UV light but that’s only a suspicion based on the use of titanium dioxide against other viruses and microbes. I wouldn’t say that the carbon bits or aluminum bits would react the same way.