At least six people have died in Britain after being told they had been healed of HIV and could stop taking their medication, Sky News has discovered.
There is evidence evangelical churches in London, Manchester, Birmingham and Glasgow are claiming to cure HIV through God.
Sky sent three undercover reporters to the Synagogue Church of All Nations (SCOAN), which is based in Southwark, south London.
All of them told the pastors they were HIV positive - all were told they could be healed.
Once a month, the church has a prayer line, where people from across Europe come to be cured of all kinds of illness.
The Synagogue Church of All Nations is wealthy. It has branches across the globe and its own TV channel.
On its website, it promotes its anointing water, which is used during the healing, and it also makes money from merchandise, such as DVDs, CDs and books.
Church members are expected to give regular donations.
It is also a registered UK charity. The Charity Commission is looking at our findings.
The Department of Health said it was very concerned: "Our advice is clear that faith and prayer are not a substitute for any form of treatment, especially for HIV treatment."
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