Do fall sick when the weather changes.

well then what are you talking about. due to weather change there are various disease. i think you are talking about asthma , remember asthma is not only caused by pollen grain but also by weather and this is also applicable for chronic obstructive pulmonary disease too. If you are talking about general health hazards related to weather changes then i will ask you to boost your immunity power and for these , there are various powder like enhancer in market said to increase your immune system. But as a doctor i can assure you this will never help you if you are not concious about your health need then none of these powder can help. these are pulmocare, immunepro powder from british pharmaceuticals