I believe it's either microwaves or x-rays
I studied this last year
The doctor. most likely, is referring to the settling process. In this process, the muscles are still adjusting or on the process of healing so he is experiencing some back pains due to this. Once the muscles are settled in place, he would feel normal again.
Benetton with an accident is where you get injured
<span>A.
Most communicable diseases are either bacterial or viral and infect the respiratory tract.</span>