No you can't, I need you. Take them from someone else healthy if you insist on testing this theory.
[That's not as lovely as it sounds. John is his assistant, he's not much good at assisting if he makes himself sick. Better to risk an unknown who's less important to Sherlock.]
private;
[That's not as lovely as it sounds. John is his assistant, he's not much good at assisting if he makes himself sick. Better to risk an unknown who's less important to Sherlock.]