After the Second World War, with the continuous development of medical technology and the emergence of more and more antibiotics, many previously incurable diseases have retreated in the face of various antibiotics. Therefore, people lamented that there is no more pain to afflict people, but due to the abuse of antibiotics , Some bacteria and viruses have developed drug resistance. In the past, only one or two antibiotics can be cured. Now, more doses are required, and even super bacteria antibiotics are useless and cannot kill. Bacterial viruses are back in positions lost in the battle against humans.

A large number of “super bacteria” have been discovered internationally, such as extended-spectrum β-lactamase Enterobacter, multiple drug-resistant Mycobacterium tuberculosis, vancomycin-resistant Staphylococcus aureus, etc. Several super bacteria have been found in my country, such as feces. Enterococcus and Acinetobacter baumannii, the reason for the production of super bacteria is the use of antibiotics, most of the common bacteria are killed, so those bacteria that did not originally have a quantitative advantage, the drug-resistant “super bacteria” survived and began to multiply, And the dominant position makes the amount of antibiotics larger and larger, and the ineffective antibiotics are also increasing. Another situation is mutation. Although it rarely occurs, it is not without. The latest typical example is the new type of pneumonia virus. In the United States only two years since it appeared last year, a variety of mutations have occurred, leading to the Ruihui vaccine in the United States. The curative effect of it has dropped significantly, and after being screened by the Indian virus nest, it has become the current delta, which has become more difficult to defend.

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