"As a precaution, I’m starting your prophylaxis with streptomycin." Dr. Pitt explained as Nurse Emma passed over cups filled with pills for each of them. If it was a no-maj disease in that letter, these pills would do nothing for Tony as he was immune. However, there hadn’t been a magical to show up yet to provide Tony with any magical equivalents to combat potential magical diseases, so in the meantime he would play no-maj. Hopefully once Harry was informed someone from a local magical hospital could be pulled onto the case.