What is put aluminum foil on door knob?

Putting aluminum foil on a door knob can help to prevent the spread of germs and viruses. It is believed that viruses can survive on surfaces for several hours or even days, and can be easily transferred from person to person by touching shared surfaces, such as door knobs. By wrapping aluminum foil around a door knob, the surface becomes less likely to harbor germs and viruses, as the foil can act as a barrier between the person and the surface. This technique may be especially helpful during times of illness, or in situations where frequent hand washing is not possible. However, it is important to note that aluminum foil should not be relied upon as a complete substitute for proper hand washing and hygiene practices.