The formation of so-called “non-neutralizing antibodies” can lead to an exaggerated immune reaction, especially when the test person is confronted with the real, “wild” virus after vaccination. This so-called antibody-dependent amplification, ADE, has long been known from experiments with corona vaccines in cats, for example. In the course of these studies all cats that initially tolerated the vaccination well died after catching the wild virus. The vaccinations are expected to produce antibodies against spike proteins of SARS-CoV-2. However, spike proteins also contain syncytin-homologous proteins, which are essential for the formation of the placenta in mammals such as humans. It must be absolutely ruled out that a vaccine against SARS-CoV-2 could trigger an immune reaction against syncytin-1, as otherwise infertility of indefinite duration could result in vaccinated women. The mRNA vaccines from BioNTech/Pfizer contain polyethylene glycol (PEG). 70% of people develop antibodies against this substance – this means that many people can develop allergic, potentially fatal reactions to the vaccination. The much too short duration of the study does not allow a realistic estimation of the late effects. As in the narcolepsy cases after the swine flu vaccination, millions of healthy people would be exposed to an unacceptable risk if an emergency approval were to be granted and the possibility of observing the late effects of the vaccination were to follow. Nevertheless, BioNTech/Pfizer apparently submitted an application for emergency approval on December 1, 2020.