The Trek is extremely safe. I was one of the people on Trek 7 and the guides and porters would not get you into any unsafe situations. Go on the trek you will have a ball.
thank you to jeff and freray for your replies on the safety factor of the trip. I have been talking to my sister this morning and it is possible our brother is now going to go with us. I have found this forum very interesting and helpful thanking you again , libsago