A disadvantage of using an attenuated live microbe in a vaccine is that it can conceivably mutate back to a virulent strain. a. True
b. False

True

Explanation:

Live attenuated vaccine are vaccines that contain a weakened part of the live virus or bacteria and protect the immune response of people with healthy immune system and does not cause disease.

These type of vaccine create a strong immune response but does not work for people who have weak immune system.

Examples of live attenuated vaccines are,

Rotavirus vaccine

Nasal flu vaccine.

A disadvantage of live attenuated vaccine is that it can conceivably mutate back to a virulent strain,They can cause disease, due to genetic reversion or to infection of immunocompromised hosts.

Another disadvantage is that they are difficult to maintain and stored.

correct answer is a. and d.

the answer is sex-linked recessive.