I agree with Silver Fox. Colloidal silver will likely speed recovery but it will not prevent you body from having its own immune response. Regular use of colloidal silver does not result in the body itself having any natural immunity but it may provide immunity itself so long as it is present. For what its worth, I don't believe in daily prolonged use of colloidal (or ionic) silver, but rather believe that it works best with perhaps occasional use and use when needed. In my opinion, all supplements should be used therapeutically when needed but one should be careful to not rely too much on supplements on a regular basis (or at least take breaks now and then) so that the body is allowed to perform as it is naturally designed to do.