The protocol has been 2.4 ata with antibiotics . Currently some are changing to 2.0ata. I have just been involved with treatment of a Lyme Alzheimer patient and doctor. We saw amazing results with 2.0 ata and antibiotics.The lady had had Azheimers for 9 years. The doctor and I got amazing results from treatment and it was one of his family members. I have been treated by someone who has treated many, many Lyme patients.