If somebody thinks he's sick, he can actually think himself into being sick. An illness can be just as real to you as if it were documented on a CAT scan.

It's very difficult to tease out the difference between purely physical illnesses and psychological illnesses that manifest themselves in real physical symptoms.

Obesity, hypertension and diabetes are just three diseases that disproportionately affect communities of color.

Someone gets vaccinated and a short time later they get a different virus and they tend to associate that illness with their prior vaccination. They confuse the other viral infection with the flu.

If children are picked up (diagnosed) earlier in the course of their illness they should do better because they will be referred to hospital more quickly.

It causes severe illness and high mortality rates.