Consumption of a gooseberry every day or tulsi leaf (Holy Basil Supplements) has proved to boost your immune system. Tulsi is also helpful for skin burns and improves memory if it is eaten on a daily basis. It has been a main ingredient in ayurvedic medicine and has been in the top ranked medicinal herb list. Eating a Camphor every month, can also help build your immune system. Camphor can be consumed along with a plantain or can be swallowed directly. Your body releases chemicals known as histamine, just as it does when fighting a cold. This can cause swelling in your nasal passages, a runny nose, coughing and sneezing. When your immune system is exposed to an allergen for the first time, you may not always have a reaction. Soon after that initial exposure, your body may begin to produce histamines when you face the allergen again. These histamines are what cause the symptoms of allergies. If you build your immune system you can fight against all these problems.
Prevent substance to which you are allergic to known as allergens
Dust mites
Pollen
Cockroaches
Mold
Animal dander
In addition to the herbs, drinking purified water and washing your hands before eating anything is mandatory to keep your self away from bacterial infection. Develop good habits and see how things work out for you.
Avoid allergens and improve your immunity boosting bacteria and bacteria benefits.