Locally prepared aluminium hydroxide gel and oil adjuvant infec­tious coryza vaccines were stored at 4°C and at room temperature for 27 months after preparation. The potency of these vaccines was deter­mined by immunization of chicken at different periods of storage. The immunizing power of aluminium hydroxide gel and oil adjuvant vaccines stored at room temprature decreased gradually after 2 months. At the same time, the potency of the same vaccines stored at 4°C was still protective till 12 months of storage for aluminium hydroxide gel vaccine and two years for oil adjuvant vaccine.