Firstly I am sorry my post was not meant to be politcal, in hindsight it did have political undertones.
Smallpox has been eradicated from the world, and if what the americans did to native americans was terrible.
No one knows how or where aids started but it almost certainly started from monkeys in africa.
Waging war in ireland, if you are talking about Northen Ireland then in recent years most of the weaponary and money have come from Irish imigrants in america. The training brittish troops gets in Ireland may have saved lots of lives in Iraq though.
The NHS does rely on anticuated computer systems, it is rumered they could save 3 billion if they switched to linux, and this is being looked at but there is no money.