Final answer:
Antibiotics cannot effectively treat viral infections because they are designed to kill bacteria, not viruses.
Step-by-step explanation:
Antibiotics cannot effectively treat viral infections. This is because antibiotics are designed to kill or inhibit the growth of bacteria, not viruses. Viral infections are caused by viruses, which are very different from bacteria. Antibiotics target specific structures or processes in bacteria that are not present in viruses, so they are ineffective against viral infections.