Did Omicron originate in animals or humans? Interacting with horses is helping a teenager in the US to regain his sense of security, which has suffered due to Long Covid symptoms. Horses are helping the teenager reclaim his life while people from all over the world with Long Covid are coming to Germany. They come for a blood purification treatment – despite it not yet being backed up by scientific data. And one in five adults in Botswana have HIV. Scientists are examining the links between HIV and COVID-19.