Be Familiar With the New Viral Vector Vaccine for COVID-19
You'll hear buzz about the new "viral vector" COVID-19 vaccine from Johnson & Johnson/Janssen (Ad26.COV2.S).
Viral vector COVID-19 vaccines give our cells instructions to make the SARS-CoV-2 spike protein, to trigger an immune response...similar to the mRNA COVID-19 vaccines from Pfizer-BioNTech or Moderna.
But they do it in different ways. The mRNA vaccines give our cells an mRNA blueprint. Johnson & Johnson's COVID-19 vaccine delivers instructions using a harmless adenovirus as a "vector," or carrier.