m sure you have a friend who has the sniffles, fever, chills, aches and pains of a viral upper respiratory infection. This is different from a
bacterial infection such as sinusitis, bronchitis, or
pneumonia. A viral infection doesn't improve with antibiotics as these infections do. A virus hijacks your own body's healthy cells and uses it to reproduce and spread. A bacteria is its own living cell and multiplies and spreads on its own and is easier to destroy in that process.