What are antibiotics? How they act against pathogens (bacteria)?

What are interferons? How do they act?

What is meant by antibiotics?

What are antibiotics? Give some examples

What are antibiotics? How was first antibiotics discovered?Name two antibiotics produced by Streptomyces spp.

What are pathogens?

What are antibiotics ? Name the first antibiotic discovered.

Why do antibiotics not work against viral infection ?