Tag Archives: Johnson & Johnson

VIDEO: Why you can’t compare Covid-19 vaccines – by Vox

  Why you can’t compare Covid-19 vaccines– by Vox

What a vaccine’s “efficacy rate” actually means.

In the US, the first two available Covid-19 vaccines were the ones from Pfizer/BioNTech and Moderna. Both vaccines have very high “efficacy rates,” of around 95%. But the third vaccine introduced in the US, from Johnson & Johnson, has a considerably lower efficacy rate: just 66%.        Continue reading