The first mRNA vaccines approved for use in humans – the Pfizer/BioNTech and Moderna Covid-19 vaccines – are being rolled out around the world. These vaccines deliver mRNA, coated in lipid (fat), into cells. Once inside, your body uses instructions in the mRNA to make SARS-CoV-2 spike proteins. The immune response protects around 95% of people vaccinated with either vaccine from […]