#asktheexperts he was frequently caught cough and cold. At least thrice per 45 days. In the last one and half month three four times fever also came around 102.5 F. some times it was not even controlled. why was he caught fever so often?? what causes are effecting his health. Almost 100 out of 98 times he drank hot water only. He got pure immunity, so I was giving lemon water thrice per week., is it the reason he caught with cold or cough? Suggest me the food items to improve immunity and what precautions to take to prevent the fever or cough and cold from attacking his health??