Brazilian scientists discovered a serious issue with Russia’s Sputnik V covid vaccine. This serious issue could lead to a new public health crisis, which is why Brazilian regulators have banned the import of this vaccine.
The vaccine in question was developed by Russia’s Gamaleya Institute. Like the AstraZeneca and the Johnson & Johnson vaccine, the Sputnik V covid vaccine uses a genetically modified adenovirus to carry genetic instructions into the cells of human recipients. Once inside the cells, these genetic instructions force the cells to develop the spike protein from SARS-CoV-2. If the process goes as planned, immune-responsive cells are supposed to respond to this new influx of spike proteins, which are delivered on the surface of the cells.