« Back to English

Passage: Doctors are increasingly concerned about the overuse of antibiotics for minor illnesses such as common colds, which are usually caused by viruses and do not respond to these drugs. Overuse allows bacteria to develop resistance, making future infections harder to treat. Health authorities now advise patients to consult a physician before taking antibiotics rather than self-medicating based on past prescriptions. Question: What is the central concern raised in the passage?