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Respiratory tract infection, digestive tract infection, trauma and postoperative infection are common, but their complications and related potential risks cannot be ignored in clinical practice. In recent years, with the increasing research, the application of infection markers to auxiliary diagnosis infection has attached more and more attentions, such as procalcitonin (PCT), C reactive protein (CRP), serum amyloid A (SAA), white blood cells (WBC), etc. Today, we are going to share something about PCT.

Precision medicine is a medical model based on individual-specific data such as genetics, biomarkers, and environmental factors, combined with advanced scientific and technological means (such as gene sequencing, biochip technology, data mining, artificial intelligence, etc.) for the prevention, diagnosis, treatment, and monitoring of diseases to be personalized, precise and customized. Compared with the traditional patient treatment mode, it pays more attention to the influence of individual factors, provides more accurate, more effective, and safer treatment programs, and has the advantages of strong guidance, high effectiveness, and high resource utilization rate.

Chronic disease and its ongoing condition usually lasts for months or years and cannot be completely cured. They include heart disease, diabetes, high blood pressure, asthma, and cancer. These not only affect the physical health of patients, but also bring a huge economic burden to the families and the society.

With the progress of medical technology and the development of social economics, the average life expectancy of human beings has been significantly improved. However, this kind of human social progress has brought a huge challenge -- population aging. At present, the proportion of the elderly population in the world is increasing rapidly. According to the World Social Report 2023 released by the United Nations on January 12th, the global population aged 65 and above is 761 million in 2021, and this number will increase to 1.6 billion by 2050. The population aged 80 and above is growing faster.

Dengue fever is a mosquito-borne viral disease that is common in tropical and subtropical regions in the world. It is caused by four different types of dengue viruses and is transmitted through the bites of infected Aedes mosquitoes. Dengue fever can cause severe flu-like symptoms, including high fever, headache, joint and muscle pain, and rash. In some cases, it may lead to severe dengue fever, which could be fatal.

25th of April each year is designated as the World Malaria Day, in purpose to highlight the need for malaria prevention and control. Malaria is an infectious disease caused by plasmodium and transmitted mainly by mosquitoes. Around 2.3 billion people (41% of the world's population) are threatened by malaria, and about 1 million children under the age of 5 die from malaria or complicated with other diseases.

The last week of April is the World Immunization Week, which aims to promote vaccination and protect people of all ages from disease. Vaccination saves countless lives and is recognized as one of the most successful and cost-effective health interventions.

Point-of-care testing (POCT) is the rapid testing of biological samples (such as blood, urine, saliva, breath gas, etc.) at the patient's side, using simple instruments or reagents, and results can be obtained within minutes to hours. The test can help physicians make timely diagnosis and treatment plans, and provide important information to improve treatment outcomes in an emergency setting.

According to relevant data, the global market size of in vitro diagnostics in 2020 is $71.49 billion, and that of 2021 is $92.08 billion, which is expected to grow from $71.43 billion in 2022 to $107.42 billion in 2029, with a compound annual growth rate of 6% during the forecast period. During this period, the COVID-19 pandemic has increased the demand for in vitro diagnostics, and market participants have collectively witnessed a significant increase in sales and revenue from point-of-care tests.