Good presentation by Dr Sten Ekberg with both some statistical information as well as some discussion on immunity and finally practical considerations of what to do about it. I almost never agree with everything a single presenter provides as information and this is no exception. But I think it is wise to consider a wide range of opinions then choose the best points among all the different opinions. I think Dr Ekberg has some useful information. https://www.youtube.com/watch?v=x3vca2KuyP0&t=984s John |