Dear Doctor: Our godson has cystic fibrosis, and seeing him struggle these past eight years has been hard. Is the new drug Trikafta we’ve been reading about really as good as people are saying? Dear Reader: Yes, it appears that the new therapy you’re referring to is indeed a game-changer in the treatment of cystic fibrosis, or CF. Trikafta is a combination of three drugs, which target the cause of…