Dr. John Campbell, PhD, is a retired Nurse Teacher in England. He is careful to stress official hygiene prevention techniques and to promote vaccination, possibly the reason he has not been deplatformed from Youtube.
Besides his clear and careful video analyses of various issues arising during the Covid pandemic, he also does some teaching in Asia and Africa when time permits.
Below is a detailed critique of the BBC paper claiming to debunk Ivermectin as a treatment for Covid, based on studies that are (apparently) not to be viewed by ordinary people. Dr. Campbell makes what could have been very murky reading amazingly clear.
The next one is an interview about Ivermectin with Dr. Tess Lawrie.