Every day we come into contact with germs including pathogenic bacteria and viruses. Practically everything we touch is certain to have germs on it, some harmless and some definitely not. Pathogenic bacteria, such as E.coli, Staph and certain moulds, can cause severe illness and are easily contracted from surfaces that aren’t adequately cleaned and disinfected on a regular basis.
More notable these days are highly contagious and virulent pathogenic viruses such as COVID-19 which has an extremely high propensity to spread to large numbers of people via contaminated surfaces and re-infect large numbers of other people.
How Long do Coronaviruses Live on Surfaces?