The Health Secretary is expected to announce a ban on gagging orders, which prevent NHS whistleblowers expressing concerns about patient safety, in a response to the Francis Report on Mid Staffordshire Trust.
Chris Dalziel lost her husband George after a routine operation at Stafford Hospital in 2007.
She said: "We've got to have people that will actually stand up, and they're not going to suffer by losing jobs through whistle blowing. People need to come forward, they need to be honest about everything that's going on in the hospital".
The NHS will have a legal duty to reveal mistakes on wards and will adopt a 'culture of zero harm'.
The Health Secretary's response came after failings at Mid Staffordshire NHS Trust, which highlighted the suffering of hundreds of people.