When prioritizing which supplies to purchase first, the priority should always be medical. In a major disaster there is nothing in the way of supplies that will be more important to the injured than medical supplies.
Food can wait, water can wait.
In disasters most serious injuries present themselves immediately. You must be able to care for them at once. Most sites lack sufficient medical supplies to care for the injured. Keeping in mind that the supplies are within the scope of those performing first aid, we have developed some numbers for you to go by. After analyzing what injuries you could expect, we developed a list of practical first aid supplies in quantities that will allow you to treat the expected number of injured that a large disaster may create.