Thomas Duncan, the first patient in the United States to be diagnosed with Ebola, came to Texas to marry his girlfriend. George Mason, a senior pastor at Wilshire Baptist Church in Dallas, said that Duncan had come from Liberia to “start a new life in America” with congregation member Louise Troh. “Louise and other members of her extended family are in isolation now because of their contact with Mr. Duncan,” Mason wrote. “You can imagine how frightening this must be for all of them, mixed with the sadness of Mr. Duncan’s diagnosis.” Duncan is now in serious condition and in isolation at a local hospital. Troh is in quarantine at the apartment where Duncan fell sick. Texas health officials said 50 people are under observation for Ebola, down from 100 on Thursday. Of those, 10 are deemed to be at high risk for exposure.