Common cold is not cured by antibiotics because it is
Caused by a Gram-negative bacterium
Not an infectious disease
Caused by a virus
Caused by a Gram-positive bacterium
Option 3) Common cold is not cured by antibiotics because it is caused by a virus.
The common cold is primarily caused by viral infections, most commonly by rhinoviruses. Antibiotics are designed to target and kill bacteria, not viruses. Since the common cold is caused by a viral infection, antibiotics are not effective in treating it. Antibiotics are only useful against bacterial infections.