Table 3.

 Some models estimating intake dose via indirect contact of fomites

Model	References
	Nicas and Best (2008)
where E m is the dose of pathogen delivered to the mucous membrane, c h is the transfer efficiency of the pathogen from the surface to the hand after a contact, c m is the transfer efficiency of the pathogen from the hand to the mucous membrane after a contact, f h is the frequency of hand‐to‐contaminated surface contact, f m is the frequency of hand‐to‐mucous membrane contact, A s is the average contaminated surface area touched per hand contact, t o is the concerned time interval, C s is the pathogen load per area of the contaminated surface, and ϕ is the decay rate of pathogen on hand.
	Wan et al. (2009)
where n is the number of hand‐to‐mucous membrane contact, N 0 is the pathogen load on the contaminated surface at time 0 and an additional amount of N x pathogen is deposited on the contaminated surface after each cough, c h in Equation 20 is the transfer efficiency of the pathogen from the surface to the hand factoring the ratio of the area of the fingerpad to the area of the contaminated surface and b is the decay rate of the pathogen on the hand.

E _m is the intake dose of the pathogen via indirect contact transmission, probability of infection can be assessed by substituting this value into the dose‐response models.