Some people haven't caught a cold for years. Once they catch a cold, it will disappear in a few days, while some people catch a cold almost once a month and it is difficult to recover. Frequent colds are a sign of low immunity. This kind of people must pay attention to environmental hygiene, don't be easily infected with the virus, even if they are not in the epidemic period, they should absorb more and be less exposed to pathogens.
The research director of new york Columbia University School of Public Health said that chronic weakness, low energy level and chronic fatigue are all related to immune system dysfunction. Lack of energy is also a sign that the immune system is not perfect. It is suggested to increase exercise and take some supplements appropriately to improve health.
After injury, the inflammatory reaction is normal, which is also the key to the recovery of tissue morphology. Wound healing can be divided into four stages: hemostasis, inflammation, proliferation and reconstruction, which require the participation of immune cells and signal molecules. People with good immunity can recover quickly from wounds, immune cells can promote chronic wound repair or skin regeneration, and various growth factors, cytokines and biomaterials have shown good effects in animal models.
Researchers at MIT and Harvard University infected mice with Escherichia coli and then treated them with ciprofloxacin (a common antibiotic), and found that the drug directly affected the tissues of mice, changed metabolites, and made Escherichia coli more resistant to antibiotics. At the same time, these drugs can disable the whole immune system, which greatly reduces the efficiency of immune cells called macrophages in fighting infection, because they are inhibited by breathing.