After treating 3,000 patients during a three-week mission to parts of the Philippines ravaged by Typhoon Haiyan, a disaster response team from Massachusetts General Hospital returned to Boston this week.  A news team from WCVB Channel 5 Boston interviewed members of the seven-person team after they arrived at Logan International Airport on Sunday, Dec. 8.  Team members described scenes of vast devastation and patients traumatized and badly in need of care.  A second disaster response team from Mass General is in the island nation now and others hospital personnel are preparing for possible deployment.  More than 400 Mass General employees have volunteered to go to the Philippines.