It is interesting to note that even though Oman and Malaysia are far apart, and the population, environment, demographics, and climate of the two countries are invariably different, there are many similarities among the studied allergic rhinitis patients from both countries. A similar study looking at allergic rhinitis among the Malaysian population was conducted by Asha'ari et al, in 2010, over the same period of time (one-year in a tertiary center). Despite a different climate pattern, only ten out of 61 patients in Al-Abri's study were categorized as seasonal type, and all of them were sensitive to Russian thistle. Malaysia is a non-seasonal country thus the majority, if not all, patients were of the perennial group.