Why would it be a bad idea to make a vaccine from a healthy, living germ?

(Pls answer.)

Achild was brought to the hospital with complaints of fever. the vital signs of the child show a temperature of 102° f. on diagnosis, the child is found to have developed exanthema subitum. which drug administered to the child with this communicable disease reduces the body temperature?

Victoria enjoys laughing with her friends as they walk around the track after school which best describes her heart rate during this activity

Is psychology a science? use evidence form the article to explain you answer.