What is why wrap aluminum foil on door knobs?

There is no reason to wrap aluminum foil on door knobs in general. However, during the COVID-19 pandemic, some people have suggested wrapping aluminum foil on door knobs as a way to reduce the transmission of the virus. The idea is that the virus can survive on surfaces for a period of time, so by covering the door knob with foil, it can be easily removed and disposed of after each use, reducing the risk of transmission. However, this method has not been scientifically proven to be effective and is not recommended by health authorities as a preventive measure. It is still essential to practice good hand hygiene and social distancing measures as the most effective ways to prevent the spread of COVID-19.