Drug resistance refers to the decline or even disappearance of the sensitivity of pathogens to drugs after repeated contact with drugs, resulting in the reduction or ineffectiveness of drug efficacy. It is often used to refer to people. The big body of society, like people, will also produce large and small diseases. If drugs cannot be applied to the case in time and completely cured at the time of first offense, drug resistance will also occur, resulting in some diseases becoming persistent diseases.
Which of the following best fits the definition of drug resistance?
Cheng, a college student in Hunan, suddenly felt uncomfortable in the morning. His family rushed to the hospital for treatment, but he didn't get better after taking any drugs. Finally, he had to go home for rest.