The COVID-19 pandemic showed that stocking and procuring vaccines are different from the inventory holding problems of production. The safety of the supply is more important than cost minimization. The Hungarian inventory model is applied to determine the initial stock if the probability of the non-shortage is given. This initial stock is the function of the procurements. The problem is non-linear as the willingness to be vaccinated is a sigmoid function of the time. The stocking of vaccines is a single-period inventory problem. The cases of three countries are simulated. The countries are Denmark, Hungary, and Mexico. They have different characteristics of willingness to be vaccinated. The numerical results of the simulation show that the prescribed probability of non-shortage can be achieved.

翻译：COVID-19大流行表明，疫苗的储备与采购不同于生产环节的库存持有问题。供应链的安全性比成本最小化更为重要。本文应用匈牙利库存模型，在给定不缺货概率的条件下确定初始库存量。该初始库存量是采购量的函数。由于疫苗接种意愿随时间呈S型函数变化，该问题具有非线性特征。疫苗储备属于单周期库存问题。本文对三个国家（丹麦、匈牙利和墨西哥）的案例进行了模拟，这些国家具有不同的疫苗接种意愿特征。数值模拟结果表明，预设的不缺货概率目标能够实现。