Question

. Why are antibiotics not effective against common cold and flu​

Answer 1

Because antibiotics only fight bacteria, and not viruses, they're usually ineffective against colds. Sometimes a cold may lead to a bacterial infection, though. In that case, antibiotics would have a benefit if they were able to prevent that kind of infection.

Answer 2

Answer:

antibiotics are not affective against common cold and flu because

Explanation:

this is because antibiotics are not effective against disease caused by virus