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In contrast to the US vaccine incident, what should be paid attention to in my country's vaccine cold chain temperature and humidity monitoring and transportation?

by:Rika Sensors     2021-12-15
In contrast to the vaccine incident in the United States, what should we pay attention to in the cold chain temperature and humidity monitoring and transportation of vaccines in my country?
According to U.S. media reports, health officials from the state of Michigan in the United States said that nearly 12,000 doses of the new crown vaccine failed due to temperature control issues on the way to Michigan. The 21 batches of COVID-19 vaccines produced by Modena in the United States and distributed by Maxson in the United States failed due to the low temperature during transportation.

Not only in the United States, but also in China, the failure of vaccines due to temperature control issues has also occurred from time to time. The most impressive is the illegal vaccine case in Shandong in 2016. The Shandong vaccine case means that in March 2016, the Shandong police cracked an illegal vaccine case valued at 570 million yuan. The vaccine was sold to 24 provinces and cities without strict cold chain storage and transportation. The vaccine contains 25 second-class vaccines for children and adults.

As we all know, vaccines must be under strict and precise control of the temperature to ensure the effectiveness of the vaccine, which is the so-called 'medical cold chain.' And every year, my country issues 500 million to 1 billion bottles (bottles) of vaccines in batches. If the vaccine fails, the consequences can be imagined. The quality and safety of vaccines concern the lives and health of the people, especially children and children, and is an untouchable 'red line'.

The US vaccine incident, affected by the epidemic, is more familiar to the public than ever before. The cold chain transportation of vaccines has once again become the focus of attention. So, looking back at the US vaccine incident, what can my country's vaccine cold chain temperature and humidity monitoring reflect and learn from it?

1. The vaccine cold chain process emphasizes the prevention of 'overheating' and neglects the prevention of 'overcooling'

In the 'National E-commerce Logistics Development Special Plan (2016-2020)'Cold' this question. The focus of general medical packaging companies and the public is often on how the packaging is not 'overheatedTechnology. According to the relevant regulations of the new version of the GSP medical cold chain, vaccines such as hepatitis B vaccine, DPT vaccine, BCG vaccine, and Japanese encephalitis inactivated vaccine require strict cold chain transportation at 2°C to 8°C. The requirement of no 'overheating' in 2℃~8℃ cold chain packaging that the high temperature does not exceed 8℃ is not difficult to achieve. It can be achieved by increasing the thickness of the foam insulation layer and adding more ice packs. However, it is indeed very difficult to reach a temperature of not less than 2°C to prevent the vaccine from being 'over-cooled' from freezing. It is difficult to achieve without professional cold-chain packaging materials and equipment. However, most of the cold chain packaging cannot truly meet the requirement of not being 'overcooled

2 Lack of continuity in vaccine cold chain data

Vaccines require a constant temperature cold chain transportation environment. Once the cold chain is broken during transportation, no matter if the temperature is too high or too low, the vaccine will be effective. It is discounted or invalid, or even changes in composition due to temperature changes, which affect human health. The impact of ineffective vaccines may not be obvious in a short period of time, but the long-term potential risks are still huge.

The control of vaccine cold chain logistics is mainly through the continuous detection of cold chain data to complete the management of the entire cold chain process. This puts forward higher requirements for the continuity and integrity of the data. However, at present, due to the multiple nodes, multiple levels, long channels, and inadequate connection of transportation and storage links in the vaccine cold chain process, the cold chain process data is discontinuous or incomplete.

3. Different climatic conditions increase the difficulty of cold chain logistics

China’s extensive geographical environment determines the huge differences in the climate of different regions, and different weather has different requirements for the cold chain, so the vast country This brings huge challenges to vaccine cold chain logistics operations. Even in the same season, there is a huge difference in temperature between the south and north of China, not to mention the different geographical features of the east and west determine different climatic environments. Therefore, in this case , It is very difficult to deliver the product to the end user, especially during natural disasters, the demand for vaccines is even more urgent. Therefore, in China's complex and changeable climate environment, it is necessary to build a cold chain system suitable for the whole of China. It is very challenging.

4. Shortage of professionals

Vaccines have the characteristics of high time-efficiency, high value, and easy deterioration. This requires staff to have a strong professional level of logistics, and they must understand both logistics and medicine. Most professional colleges do not have medical logistics majors, and logistics or medical talents recruited by enterprises need to be trained.

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