We are hundreds of doctors and scientists from all corners of the globe. We have written three letters to the European Medicines Agency, urgently warning of short term and long term dangers from COVID-19 vaccines, including clotting, bleeding and platelet abnormalities. We first began warning of blood-related risks before media reports of clotting led to vaccine suspensions around the world. In the absence of crucial safety data, we are demanding the immediate withdrawal of all experimental gene-based COVID-19 vaccines. We oppose vaccine passports, which threaten public health and violate Nuremberg and other protections. We are warning that ‘health passes’ place coercive pressure on citizens to submit to dangerous medical experimentation, in return for freedoms that once were human rights.