Question

What is virus attenuation in practical terms for successful vaccine discovery?

a. Passage of live virus from cell to cell and a search for less virulent

mutants

b. As (a) but using low temperature (33oC) to select cold adapted mutants

c. Direct random mutagenesis to create a less virulent mutant

d. Recovery of a naturally occurring 'wild' virus which is naturally less

virulent​

Answer 1

Answer:

A) is the correct answer

Answer 2

Answer:

A) IS THE CORRECT ANSWER