Which of the following statements is/are correct about vaccination that provides protection against an infectious disease? 1. It blocks the entry of the infectious agent into the body. 2. It produces antibodies against infection. 3. It kills the infectious agent when it enters the body. Select the correct answer using the code given below.

Which one of the following statements is correct about effects of antibiotics on viruses ?

Which of the following is mRNA vaccine used against Covid-19 infection?

Which of the following statement is incorrect about Erythromycin?

Match List- I with List- II and select the correct answer using the codes given below : List-I A. Audiogram B. E.C.G. C. E.E.G. D. Mammogram List- II 1. Heart 2. Brain 3. Ear 4. Breast

An antibiotic is not useful against a virus whereas a vaccine is. Which one of the following is the most appropriate reason for this ?