infectious diseases
COVID 19 Vaccine
Preparations of COVID 19 Vaccine
There are two mRNA vaccines for COVID-19: The updated 2023-2024SARS-CoV-2 virus (COVID-19) mRNA vaccineproduced by Pfizer-BioNTech The updated 2023-2024SARS-CoV-2 virus (COVID-19) mRNA vaccineproduced by Moderna The mRNA vaccines do not contain viral antigen but rather deliver a small, synthetic piece of mRNA that encodes for the desired target antigen (the spike protein). After being taken up by cells of the immune system, the vaccine mRNA degrades after instructing the cell to produce viral antigen. The antigen is then released and triggers the desired immune response to prevent severe infection upon subsequent exposure to the actual virus. There is one spike protein vaccine for COVID-19: The updated 2023-2024SARS-CoV-2 virus (COVID-19) recombinant spike protein nanoparticle vaccineproduced by Novavax The spike protein vaccine contains a recombinant form of the SARS-CoV-2 spike protein, which then triggers the desired immune response. 