Ricardo Delgado from the Fifth column, talks about his research on covid vaccines, namely from Pfizer.

Source: https://odysee.com/@laquintacolumna:8/Grafeno,MICROTECNOLOGIAypatronesartificialesenVacunasCovidRICARDODELGADOMARTÍN(QUINTACOLUMNA):5