Employee is sneezing at his desk

CBS News:

CBS News suggested that a single doorknob and infect a portion of your office within hours.

Germ-filled bacteria

Worcester Polytechnic Institute:

The Worcester Polytechnic Institute said they found 1,323 colonies of bacteria residing on doorknobs after doing a study on 27 of them.

E. Coli units

E. Coli:

In a recent study, E Coli was reported as the second most common bacterial unit from door handles. Units of E Coli from door handles could be a threat to serious infections such as cholecystitis, bacteremia, cholangitis, urinary tract infection.