Without the cold-chain network, it would be impossible in today's world to transport large quantities of perishable goods, primarily food and medicine, over long distances, but it is still very important that the necessary materials reach their destination on time and with adequate cooling. This is absolutely true for the vaccines created to stop the Covid-19 pandemic, which had to be distributed quickly and at certain storage temperatures to all parts of the world. This is a rather difficult task with NP-hard complexity. In this research, we are investigating the optimal way to get from a distribution center in Budapest to the county towns with transport vehicles, so that neither the vaccines deteriorate, nor we violate regulations. For this, we used vehicle route planning principles and Excel-Solver software.
Today's world is changing and evolving with incredible speed. The constantly growing population leads to a large number of demand for increasingly diverse products. Since our main goal in logistics is to make the customer satisfied, so in order to do this, it is essential to develop technology. Over the past few years, mainly due to a pandemic, e-commerce has boomed. However, companies need to store the ordered products somewhere, that is, they need warehouses. We have to choose carefully which warehouse is the ideal one for us, since if we do not choose the right one, the final delivery may even be delayed. Although warehousing is of great importance in today's world, no one has summarized, like this paper, how we got to the warehouses we use today. The paper shows from antiquity to the 2000s how the development took place.
The emergence of vaccines to contain and defeat the now-famous virus has been a huge step forward for mankind, but how and under what conditions these vaccines can get from the place of production to the place of use has been a major challenge. Whether in packaging or transport, there are stringent requirements to be met and COVID-19 vaccines have different cold chain requirements depending on the type of vaccine, its thermal stability, its current condition, and its shelf life at different storage temperatures. Currently, one vaccine must be stored and transported at ultra-low temperature (ULT - Ultra-Low Temperature) between -90°C and -60°C. Effective use of this requires good cold chain planning, efficient management of vaccine supply, logistics and distribution, and strategic deployment of ULT equipment. The pandemic has brought cold chain logistics to the forefront, and in this paper, we examine the relationship between logistics and the cold chain.
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