The Moderna biotech company has shipped the first batches of its COVID-19 vaccine to the US National Institute of Allergy and Infectious Diseases. The trials will be held at Kaiser Permanente Washington Health Research Institute in Seattle. Testing will involve 45 young, healthy volunteers and it uses Moderna's mRNA-1273 vaccine.
Unlike a normal vaccine, RNA vaccines work by introducing an mRNA sequence (the molecule which tells cells what to build) which is coded for a disease-specific antigen, once produced within the body, the antigen is recognized by the immune system, preparing it to fight the real thing.
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