Human infection with bacteria and viruses, whether it is a cold or various difficult illnesses, can lead to illness caused by various bacteria and viruses. Before the continuous development of modern medical technology, the emergence of antibiotics gave humans a phased victory in the fight against bacteria and viruses. The hydrogen peroxide disinfection machine editor found through research that in ancient times, traumatic infections could cause a large number of soldiers to die. However, the emergence of penicillin in World War II greatly reduced the mortality rate of wound infections and saved thousands of soldiers. It can be said that penicillin made a huge contribution to the victory of World War II.

After World War II, medical technology continued to develop, and the emergence of antibiotics became more and more common. Many diseases that were previously incurable retreated in the face of various antibiotics, causing people to sigh that they no longer suffer from pain and suffering. However, due to the overuse of antibiotics, some bacteria and viruses developed resistance. Originally, only one or two antibiotics could cure it, but now more doses are needed, and even superbug antibiotics are useless and cannot be killed. Bacterial viruses have returned to the position they lost in the battle against humans.



A large number of "superbugs" have been discovered internationally, such as extended spectrum β - lactam Escherichia coli, various drug-resistant tuberculosis bacilli, vancomycin resistant Staphylococcus aureus, etc. In China, several superbugs have been discovered, such as Enterococcus faecalis and Acinetobacter baumannii. The reason for producing superbugs is the use of antibiotics, which kill most common bacteria. Therefore, those bacteria that originally did not have a numerical advantage, the drug-resistant "superbugs" have survived and begun to multiply in large numbers, occupying a dominant position, resulting in increasing use of antibiotics and ineffective antibiotics. Another situation is mutation, although it rarely occurs, it is not absent. The latest typical example is the novel pneumonia virus, which has undergone multiple mutations in just two years since its emergence in the United States last year, resulting in a significant decrease in the efficacy of the American Ruihui vaccine. After screening by the virus nest in India, it has become the current Delta, making it more difficult to defend against.