When sick people are treated with radiation, that does not make them radioactive. Radiation is dangerous, but radiation patients are not.
It's not dangerous to people on earth, because the atmosphere shields us from the radiation.
Any electromagnetic radiation can be dangerous. Alpha waves are higher on the radiation scale than x-rays so yes, they are dangerous.
Though radiation therapy has a minimal role in the primary treatment of malignant melanoma, for patients who have metastatic disease, radiation may be helpful.
EXTREMLY
Yes!! Of course they can!! Today's radiotherapy machines are know as Linear Accelerators which are electric and once they are shut off they are off no radiation leaks, or go anywhere. They do not have a live source, and you do not become radioactive when you are receiving radiation therapy. You can't harm others, and you can't spread radiation to others. The only thing you can't do is be in the room with them when they are receiving the treatment. Other than that being around family is a great way for the person with cancer to get better it picks up their spirits, and improves their quality of life.
It is potentially dangerous. The radiation level found in granite is enough to suppress the immune system, cause birth defects, and cause cancer. There are granite composite options which are not containing the level of radiation that is dangerous.
alpha radiation
Patients receiving intracavitary radiation do become temporarily radioactive
Patients receiving interstitial radiation do become temporarily radioactive
Yes they very are
Children under the age of 18 should not be near a radiation patient. Radiation can poison the child. While patients are taking radiation treatment the child is exposed to there saliva, sweat, urine, tears any bodily fluid which contains (of course) radiation and cause the child to get very ill.
Other than Japan most countries haven't been majorly affected by radiation at dangerous levels.