A video viewed thousands of times in multiple posts on Facebook claims Pfizer-BioNTech’s Covid-19 mRNA vaccine contains lipid nanoparticles that could be concealing „little computers”. The claims are false; nanoparticles are microscopic particles that measure less than 100 nanometres, which have no relation to nanocomputers; an infectious diseases expert told AFP no technology currently exists by which computers could be inserted into an mRNA vaccine.