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Fall/Winter Flu Prevention Countdown! See How Steam Generators Safeguard Flu Vaccine Quality!


As September arrives and the weather turns colder, respiratory illnesses gradually increase. At a press conference held by the National Health Commission on "Seasonal Events and Health," Wang Huaqing, chief expert of immunization programs at the Chinese Center for Disease Control and Prevention, recommended that influenza vaccinations be completed by the end of October. The production of high-quality influenza vaccines relies heavily on advanced equipment, with steam generators being a crucial component.

In addition to its use in the well-known fermentation and culture stage of vaccine strains, steam generators are also used in the freeze-drying process after vaccine purification.

The freeze-drying process first freezes the water in the vaccine, then removes it through desorption. During the desorption drying stage, the temperature is raised and a high vacuum is maintained. The steam generator produces steam at a maximum temperature of 230℃, providing a 100% dry steam heat source to the heating zone. This keeps the internal environment of the entire freeze-drying equipment at approximately 40℃. Simultaneously, a vacuum pump assists in stable operation, ensuring smooth desorption of bound water. This stage takes approximately 25% of the total time, reducing the final moisture content to 1%-3%. This process ensures the vaccine retains good biological activity after freeze-drying, guaranteeing the effectiveness of vaccination.After freeze-drying, vaccine residue may remain inside the equipment. If not cleaned promptly, this can affect the production of the next batch of vaccines. At this point, the high-temperature steam generated by the steam generator can serve as a cleaning medium. Without the need for chemical cleaning agents, the high temperature dissolves and washes away the residue, ensuring both equipment cleanliness and preventing potential chemical contamination of the vaccine. This provides a double guarantee for the safety of subsequent vaccine production.It can be said that steam generators, with their high efficiency and stability, provide strong support for the high-quality production of influenza vaccines and other vaccines, indirectly safeguarding public health and safety. They enable the large-scale, safe production of high-quality influenza vaccines, providing solid hardware support for respiratory disease prevention and control in autumn and winter, and building an invisible "protective wall" for public health.​

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