What we actually know about the vaccines and the delta variant
The Covid-19 pandemic has changed, and with it, so has the effectiveness of the vaccines. The bottom line remains the same: The mRNA vaccines from Pfizer/BioNTech and Moderna that are most prevalent in the US are still quite effective in preventing any illness from the novel coronavirus, and extremely effective in preventing the kind of severe illness that leads to hospitalization and death. On Wednesday, the Centers for Disease Control and Prevention confirmed those basic…