"You see children getting many episodes of malaria and gradually building up their immune response.

VOA: standard.2010.01.20

The institute has scoured the results of international studies to find antigens substances that provoke an immune response in the body that could be a potent weapon against malaria.

VOA: standard.2010.01.20

Allergies are abnormal reactions of the immune system in response to otherwise harmless substances.

VOA: special.2009.07.28