Time

Taking the letter into his hands, Dan flipped it over and noticed the military stamp in the right-hand corner. Nodding, he gave back the letter to Mark and said, "Alright, the letter seems authentic. I will inform this to the General, please send this group to the medical faculty to have them checked." He turned to the side and gave orders to another soldier. 

Mark didn't think about it much and gave a nod to his teammates before they all followed the soldier to the back of the buildings. They crossed the compound and walked into the hospital. Entering, they noticed many people walking around and checking injured patients. 

They slowly followed the soldier to the end of the corridor and stopped in front of a door which had a sign to the side saying 'Testing'. The soldier asked them to wait outside while he went inside and came out with a doctor beside him.