There are no stds on object
Bacteria and virus doesnt survive on surfaces for long.
Why is there stds on object?
Where do you think those pathogens come from?
I have no idea where and how did you come up with the idea that there is std on object.
Why do you think there is dry blood on your pencil?
I am glad you understand this is impossible.
The pathogen doesnt live long and will die quickly. If there are stds on object, everybody in the world will have stds.