I started to write about science and medicine at the Washington Post, in the early days of the AIDS epidemic.

I have never earned one penny from any pharmaceutical company. I will never accept one penny from them either. Ever.

I think it's too soon to say that, and I think, basically - most of the people that I ran across and most of the studies that I saw suggest people don't go to McDonald's to eat healthy food. They go to eat fries and cheeseburgers.

There are always potential side effects for every vaccine.

Flu is easily transmitted, so if you are working with sick people - who are most at risk for getting seriously ill - you ought to be vaccinated. I am not really equipped to say whether it should be the law or not.

I think it is true that you can eat extremely healthy food at McDonald's, and you can eat amazingly badly at Chipotle.

People wrap themselves in their beliefs. And they do it in such a way that you can't set them free. Not even the truth will set them free.