I have very mixed feelings when people or institutions do a complete 180 on a topic. I don't see it much in real life, and when it happens I tend to think they were not that firm in their convictions in the first place. Oh, people do move on issues, but usually slowly unless something drastic happens to them personally.
That being said, I am not quite sure that is what happened with this church. The article is not as clear as I would like.
The father of the current pastor did not believe in vaccines, but it seems the current pastor is not so hard core.
"In a statement on the church website, Pearsons also insisted that she did not share her fathers fear of autism.
“Some people think I am against immunizations, but that is not true,” the statement said. “Vaccinations help cut the mortality rate enormously. I believe it is wrong to be against vaccinations. The concerns we have had are primarily with very young children who have family history of autism and with bundling too many immunizations at one time. There is no indication of the autism connection with vaccinations in older children."
So, I am not sure the church did flip-flop. There is adifference from being completely non-vax and preaching caution.
Furthermore, the church is also recommending people who do not want to be vaccinated quarantine themselves at home for the next two weeks (perhaps everyone should - vaccines can take 2 weeks to kick in). Quarantine is a viable option for some in an outbreak.