Infection spread about through a few means – either directly from an infected person to a susceptible person where there is a physical transfer of the micro-organisms; or indirectly when the susceptible person comes into contact with a contaminated surface. Throughout the day, one will definitely touch a bed, tables, chairs, door knobs, handrails, washroom surfaces, cutleries, trays, cups, computer keyboards, buttons and knobs of electronic devices, office desk-top, phones, vehicle seats, steering wheels and many more.
These surfaces are contaminated through air-borne micro-organisms, contaminated droplets , or even vector-borne (insects and animals) - including flies, mosquitoes, ticks, cats, dogs, rats and so on. Or it could be from an infected person who happens to touch the surface just before the susceptible person did.