I feel that John should not open the attachement as the information and inside may not be reliable. He should not take or purchase the medicine introduced by his friends. instead, he should check if the medicine is safe to be consume and where it was originated. he can also consult a doctor and ask more information about the unknown medicine. He should not follow the preventive measures taught by his friend as it might not be true. he should consult a reliable and experienced person for further advice.
what we could have been, 9:36 PM.