( 1- a comparative of different cohorts studies for the same research area among malaysian vs brazilian, vs south american, singaporean etc etc to this cohort i’m doing in saudi arabia and the middle east . and the question here is to see is there any difference between my study and other studies and you must put this a a research question in a scientific terms?-2-is there any difference between serum CRP levels between malaria infection , bacterial infection and viral infection ? also, in which infection it shows higher CRP level??-3- is there any difference in liver enzymes ALT and AST ( liver enzymes) between malaria, bacterial and viral infections and in which one it it higher ?-4-what other difference are there between the 3 malaria with regards to white blood cells count ? platelets count? esr level?