How do diseases transmit via surfaces?
It is common for many infectious diseases to transmit through surfaces (see figure below). Surfaces can include a range of commonly touched objects such as tabletops, door knobs, toys, light switches and other objects. Generally speaking, the likelihood of disease transmission through surfaces depends on the following factors:
- Amount of pathogen (virus) shed by infected individuals
- Virus survival on surfaces
- Rate of transfer from surfaces to hands or mouth
- Number of viruses required to cause disease (infectious dose)
- Resistance of the virus to disinfection
Surface-mediated transmission. Adapted from: Julian, 2010.
Want to know more?
- What does “detection” mean when discussing viruses in the environment?
- How can surfaces get contaminated with SARS-CoV-2?
- How long does SARS-CoV-2 survive on surfaces?
- To what extent can SARS-CoV-2 be transferred between surfaces and hands?
- What type of surface cleaning and disinfection should we promote for homes and workspaces?
- How resistant is SARS-CoV-2 to disinfection?
- How can we maintain cleanliness of public water pump handles?
- Useful resources on surface disinfection
Editor's Note
Author: Karin Gallandat
Review: Karen Levy, Jacqueline Knee, Sian White, Robert Dreibelbis
Last Update: 15.04.2020