Can either ivermectin or hydroxychloroquine, or both used together, reverse severe Alzheimer’s disease as exhibited, for example, by a person who cannot carry on a conversation? Or will these agents only help slow down or prevent further cognitive decline in people with early signs of illness?

While you are pessimistic about this, given the severe state of illness posed by those suffering advanced dementia like Alzheimer's, when people reach a level of true incapacitation, no longer recognizing loved ones, and trapped within their own mind with a body that cannot express anything they are truly thinking, we can tell you that treating the infection with an effective antiviral can reverse things and allow healing and restoration. It will take longer for those with severe impairment to recover than to reverse an early stage of cognitive loss, but it is not at all impossible to do. So the key is to implement treatment and then keep it going on a chronic basis with an essential ingredient being regular use of the Lightworker Healing Protocol and Deep Subconscious Mind Reset. This will support the healing along with repair of the karmic underpinnings of vulnerability, as well as addressing the many direct manipulations needed to be done by the divine realm, to intervene at a level of cellular consciousness for removing the virus particles and to undo the damage to brain tissue from the long-standing illness.