Cf is a rare disease, no surprise there, but how many people have it?
There is around 70,000 people worldwide who have cf. 30,000 cases are in the U.S and 40,000 others throughout the world.
Cf is a genetic disease, which I’ve already gone over in previous posts. In order For people to be able to have cf, both parents must have a copy of a defective cf gene. These people are called carriers. Every 1 in 23 people are a carrier, which equals to 12 million people.
With that many carriers you’d expect more people to have cf right? Wrong.
Even if both parents have a copy of the gene there is still a 1 in 4 chance that their child will actually have cf, therefore making it a rare disease.