Chronic granulomatous disease (CGD) is an inherited (genetic) immune system disorder that occurs when a type of white blood cell (phagocyte) that usually helps your body fight infections doesn't work properly. As a result, the phagocytes can't protect your body from bacterial and fungal infections.
The house was built circa 1939. When used in date ranges, a circa is applied before each approximate date, while dates without a circa immediately preceding them are generally assumed to be known with certainty.
If we're going to be picky, let's remember that the manufactured home business has only been around since about the 1940s. And HUD code homes since 1976. But there's a ton of stick-built inventory that is from the 1800s almost 100 years earlier.