My dad was diagnosed with bacterial meningitis and septicaemia. He woke up but we were not able to contact him. He was in one hospital for 6 days , it seem that he was in big pain when they were tryng to wake him up but with no succes. Today they took him to another hospital and put him in coma. Doctor says he have 50% chances for survival. How long can he be in coma? how long will the antibiotics fight the bacteria?