my son is 4 yrs old & so far I have given him all the vaccinations mentioned in the chart including the optional vaccines like Hib 1st,2nd,3rd,PCV 1st,2nd,Rotavirus 1st,2nd,Varicella,HAV 1st,2nd,Typhoid,Meningococci,Mantaux,BCG.We are travelling to India & worried about malaria.Wanted to know what medication should I give him for the prevention of malaria.