$INO Yo! $MRNA $NVAX Having a cold chain problem?🥴 Other vaccine candidates, including those from Johnson & Johnson, Sanofi/Novavax and others, use a viral vector (adenovirus) to carry a “protein subunit” into the body; that subunit then confers the immune response. The virus-based vaccines (which is also typically the method used to deliver flu vaccine), generally speaking, are stored and shipped at 2-8°C.
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