As a forward, I'm not a doctor and this is not medical advice.
"A virus sleeping deep in our DNA for millions of years may be coming back to life in a form of ALS, killing nerve cells and causing their fatal symptoms, government scientists reported Thursday.
And the discovery just might lead to a treatment for ALS, an incurable disease that affects between 12,000 and 20,000 Americans, depending on whom you ask.
The virus is called HERV-K, and it incorporated itself — permanently — into the human genome between 2 and 5 million years ago. It’s a human endogenous retrovirus — an example of nature’s own genetic engineering."