Some people are completely missing a very salient point.
It could actually be very, very harmful for some of the victims for A reminder to appear.
HelsinkiLights I am so sorry your relatives are suffering 
. You made the absolutely vital point that your relatives cannot even hear the name at this time. People need to understand that. Thank you for saying it, even though this is a hugely stressful and distressing time for you.
There is no way of definitively knowing who would be badly affected in advance by a visit. Simply saying "Would you like X to visit?" Or "Here's a letter from X?" could be enough to trigger a PTSD flashback. These flashbacks can have severe physical as well as psychological consequences.
It is also worth noting that both the development of PTSD itself, and how well a victim is able to later process any flashbacks, are directly linked to whether the victim has bodily autonomy. So if someone is immobilized, unable to move under their own steam trauma and the consequences of trauma are far more serious. Many of the victims will be at this time effectively totally unable to move about at this time.
There has been a lot of progress in the understanding of PTSD and traumatic brain injury in recent years. A lot of this is due to the development of neuroscience as a discipline and the ability of recent technology e.g. MRI scanners to show what actually takes place in the brain of a traumatized person.
Trauma is a physical injury, not "just" a psychological one. There is actual physical damage to the brain. Not a chemical imbalance, nor some airy fairy notion. An actual physical injury on a microscopic level.
There are a lot of very interesting books in that area. "The Body Keeps the Score" by Bessel Van Der Kolk is an extremely good place to start. If you have little to no real knowledge of what PTSD or trauma really is, then it's an excellent place to start learning. Some of the opinions stated on here do suggest a gap in knowledge and understanding of this area. That there is a gap in knowledge is not surprising- a lot of the knowledge in this area is very, very recent. Another good source of information is the US Army and the US Veteran's Association.
And it's worth filling that knowledge gap. Everyone here will, at some point, know someone with PTSD.
7-8% of people will experience PTSD at some point in their lifetime- 10% of women and 4% of men
12-20% of armed forces veterans will experience PTSD (the figure varies depending on where and how they see service)
49% of women who are raped develop PTSD- this is thought to account for a lot of the difference between male and female rates of PTSD
It's only just becoming clear to clinician how huge the role of childhood trauma (sexual abuse, terror, physical abuse, neglect) is in later development of many mental health conditions, not just PTSD. (Although there has been anecdotal evidence of this for along time).
This should underline our awareness of the fact that many of the victims are children. Doing the wrong thing for them at this stage in their recovery could not only have devastating consequences now, but could also have very, very far reaching long-term consequences too.
So:
- A visit could be severely re-traumatizing for victims and especially child victims. This is compounded by the fact that many victims are so severely injured that they are unable to move at this point.
- The person in question is herself a victim and could well be traumatized herself, could develop PTSD herself. This is in addition to things like survivor's guilt.
- There are obvious security concerns around visits, especially as the terror threat level is still elevated.
- The person in question did not cause this. It is not their fault.