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00:00:03;14 , 00:00:05;03 , In the nanoshell therapy, 

00:00:05;03 , 00:00:06;14 , the nanoshells by themselves

00:00:06;14 , 00:00:08;29 , are completely harmless to the patient,

00:00:08;29 , 00:00:11;14 , the light by itself is harmless to the patient,

00:00:11;14 , 00:00:13;22 , and it's only when you get the combination,

00:00:13;22 , 00:00:15;11 , right at the tumor site,

00:00:15;11 , 00:00:17;15 , that you induce any harmful effects.

00:00:17;15 , 00:00:19;11 , And that allows us to spare damage

00:00:19;11 , 00:00:21;05 , to any of the normal tissues.

00:00:21;19 , 00:00:23;29 , So, the health risks of nanoshells 

00:00:23;29 , 00:00:25;21 , seem to be very, very minimal.

00:00:25;21 , 00:00:28;22 , There's been extensive work done now

00:00:28;22 , 00:00:31;11 , looking at the toxicity and safety of nanoshells

00:00:31;11 , 00:00:34;07 , to go into the FDA regulatory process.

00:00:34;07 , 00:00:35;21 , There haven't been any alarming

00:00:35;21 , 00:00:37;05 , findings at this point.

00:00:37;05 , 00:00:39;05 , But I think it's critical to continue to

00:00:39;05 , 00:00:42;19 , study this, and to stay on top of it.

00:00:42;19 , 00:00:44;04 , And with any new nanomaterial,

00:00:44;04 , 00:00:46;03 , it's important to be aware

00:00:46;03 , 00:00:48;11 , of potential risks early, and to try and

00:00:48;11 , 00:00:51;05 , explore them at the beginning of a technology.