I'm a medical doctor and a biomedical scientist.

Anthrax is a deadly inhalational disease.

As a scientist in the field of biological warfare defense, I have never had any reservations whatsoever about helping the anthrax investigation in any way that I could.

I don't know Dr. Rosenberg. I have never met her, I have never spoken or corresponded with this woman. And to my knowledge, she is ignorant of my work and background except in the very broadest of terms.

I have had nothing to do in any way, shape or form with the mailing of these anthrax letters, and it is extremely wrong for anyone to contend or suggest that I have.

I am extremely proud of my service with the government and my efforts to help safeguard public health and protect our country against the scourge of offensive biological warfare.

The next day I was put on paid leave from my new job at Louisiana State University. This is very painful to me, though once again I understand the circumstances in which my employers find themselves in light of these actions taken against me.

So I was surprised at the notion that I might have brought anthrax to my home, and would have been even amused if it was not for the fact that this matter is so grave and serious.

But I am just as appalled that my experience, knowledge, dedication and service relative to defending the United States against biological warfare has been turned against me in connection with the search for the anthrax killer.

And indeed, last week, the FBI executed a search warrant on my residence. This happened one day after my attorneys had left a message on the lead FBI investigator's voice mail confirming my continued readiness to answer questions and otherwise cooperate.

All Americans value the freedom of speech and the freedom of the press, and I believe this is essential for our continued way of life. But with this freedom comes responsibility. That responsibility has been abdicated here by some in the media and some in the government.

I'm a medical doctor and a biomedical scientist.

I am a loyal American, and I love my country.

In due course, following an additional debriefing, the FBI confirmed to me and to my former counsel, Tom Carter, that I was not a suspect in this case. I assumed that my involvement in the investigation was over.

After eight months of one of the most intensive public and private investigations in American history, no one - no one - has come up with a shred of evidence that I had anything to do with the anthrax letters. I have never worked with anthrax. I know nothing about this matter.

Later, I went down to the Washington field office and an onsite polygraph was administered.

After reviewing the polygraph charts in private, the polygraph examiner told me that I had passed and that he believed I had nothing to do with the anthrax letters.

In fact, I had previously helped train one of the FBI agents who searched my apartment.

I was devastated by the loss of my job in March, although I can understand why it occurred.

I especially object to having my character assassinated by reference to events from my past which bear absolutely no relationship to the question of who the anthrax killer is.

All Americans value the freedom of speech and the freedom of the press, and I believe this is essential for our continued way of life. But with this freedom comes responsibility.

Every human being has to feel a part of a tribe. It's programmed into us. And you have to feel that you're contributing to something.

I learned a couple things. The government can do to you whatever they want. They can break the laws, federal laws, as they see fit... You can't turn laws on and off as you deem fit.

I want to look my fellow Americans directly in the eye and declare to them, 'I am not the anthrax killer.' I know nothing about the anthrax attacks. I had absolutely nothing to do with this terrible crime.

I was a guy who trusted the government. Now, I don't trust a damn thing they do.

Is the Justice Department incapable of regulating itself? Without strong regulation, the privileges we give them to investigate us, to conduct their normal anti-crime things, can spiral out of control.

Whether we're at war or have been attacked, the foundation of society is that you hold to the laws in place. I used to be somebody that trusted the government. Now I really don't trust anything.

The growth of technology is such that it is not possible today for a nuclear physicist to switch into medical physics without training. The field is now much more technical. More training is needed to do the job.

I have written two medical novels. I have never studied medicine, never seen an operation.

With tens of thousands of patients dying every year from preventable medical errors, it is imperative that we embrace available technologies and drastically improve the way medical records are handled and processed.

Advances in science and medical research and public health policies have meant that life expectancy for Australians is one of the highest in the world.

There is an element of anger among women who've been raped. There's certainly a major element of humiliation. But it really does seem like a medical condition of shock and horror.

The whole story of the comfort women, the system of forced sexual slavery, the medical experiments of Unit 731, is not something that is in the US psyche. That is changing because many books are coming out.

Modern medical advances have helped millions of people live longer, healthier lives. We owe these improvements to decades of investment in medical research.

Every year, more than 300 million x-rays, CT scans, MRIs and other medical imaging exams are performed in the United States, and seven out of 10 people undergo some type of radiologic procedure.

If you're so pro-life, do me a favour: don't lock arms and block medical clinics. If you're so pro-life, lock arms and block cemeteries.

It is my sincere hope that hospitals across Indiana, and America, continue to strive for excellence when it comes to providing medical care. This proposed rule will be harmful to communities who wish to upgrade their medical facilities.

My parents and grandparents have always been engaged in teaching or the medical profession or the priesthood, so I've sort of grown up with a sense of complicity in the lives of other people, so there's no virtue in that; it's the way one is raised.

As a medical doctor, it is my duty to evaluate the situation with as much data as I can gather and as much expertise as I have and as much experience as I have to determine whether or not the wish of the patient is medically justified.

Most medical physicists work in the physics of radiation oncology making sure that the desired dose is given to the cancer and the dose to normal tissues are minimized.

We also have a program in place for low income people. A family of four making $26,000 a year can receive medical coverage, irrespective of citizenship or what documents.

Consider this: I can go to Antarctica and get cash from an ATM without a glitch, but should I fall ill during my travels, a hospital there could not access my medical records or know what medications I am on.

The sacrifices made by veterans and their willingness to fight in defense of our nation merit our deep respect and praise - and to the best in benefits and medical care.

Community health centers do a great deal with limited resources. They provide critical medical care services to many who would otherwise have no other place to go or would end up in an emergency room.

We still have people in the active duty, and if people are feeling ill, if they're experiencing various symptoms and they're still in the active duty, they're less likely to come forward because that could result in their medical discharge.

And of course, identifying all human genes and proteins will have great medical significance.

Medical research in the twentieth century mostly takes place in the lab; in the Renaissance, though, researchers went first and foremost to the library to see what the ancients had said.

You know what they call the fellow who finishes last in his medical school graduating class? They call him 'Doctor.'

Sometime they don't let you know that they know that they don't know everything, but the core of the medical approach is that you try to identify pathologies, which are subsystems within the human body or the larger system that are having undesirable consequences.