This last year, I have been getting continuous colds, coughs, sore throats etc. Before this year I rarely got ill, although from the beginning of this year I seem to pick up illnesses almost every month, and find it hard to shift these illnesses. Along with the illnesses it follows with inner ear congestion. This is really affecting my studies because I am continuously feeling tired. Could somebody please help me understand why I am continuously getting ill??? what are the reasons for these repetative illnessses, and what can I do to prevent them? Thanks