Because colloidal gold is protected by the aptamer of the virus to be detected, in the absence of virus, colloidal gold appears colorless or pale pink. When virus molecules exist, the aptamer on the surface of colloidal gold is captured by virus molecules, which makes colloidal gold aggregate, thus making the color of colloidal gold change from colorless or pale pink to blue. So the virus on the clothes can be detected by colloidal gold color development technology when it is dead.
Clothes are the general name of clothes, clothes, shoes, bags, toys and ornaments.