>> wow. can you explain, please, doctor, what the vaccine does to the body's immune system to create these results? >> well, so -- so the vaccine gives your body a -- a head start. a head start to see -- to -- to react to a virus -- to an -- a foreign invader, well in advance of when that -- that infection occurs. and so, it's like having an army prepared, before -- before an attack. um, and so, in the vaccinated patient, that army's already ready. maybe, has to adjust a little bit. and it can, quickly, respond. in the unvaccinated patient, um, that's not the case. the -- the foreign invader is -- um -- completely catches the body by surprise, and allows it to grow -- um -- unchecked. >> like i said, you have been analyzing these x-rays since the beginning of the pandemic. can you, please, tell us -- i mean, can you tell us if the different variants from -- can you see different variants, in