QUOTE : While the WMS views the invasion and establishment of a pathogen as the beginning of the disease, Unani attributes the success of the pathogen to the individual’s susceptibility to infection (host factors) due to dystemperament or humoral imbalance. Supporters of the Unani view observe that in an epidemic (even of catastrophic proportions) not everyone gets infected despite the ubiquity of the infectious agent, just as most people with streptococcus in their respiratory tract do not develop strep throat infection.