Thanks for your question on Health Care Magic.
I can understand your concern.
Yes, your friend can definitely apply for UAE work permit. Because her chest
x ray is absolutely normal. She is not having any evidence of active infection or healed scar.
And even if she is having old scar, she can still apply for work visa. We just need to prove this by CT thorax and
bronchoscopy.
CT thorax is more Informative than chest x ray.
Bronchoscopic evaluation is also far superior to rule out infection.
If both of these are normal or negative for active infection, she can argue with visa authority about not having active, infectious disease.
Hope I have solved your query.
Wishing good health to your friend.
Thanks.