hi my name is alfredo and i have a question id like to ask ... had tonsol cancer and id like to now if after all the treatment i went throw. if i was to go back to work wich is a outdoor construction site would the air in a city like houston with all the palution would the air cause a reaction to the cancer and case for the cancer to re aper? can any one help me out with this.. and if there is any one that speakes spanish would you come forward...