New research from France adds to evidence that widely used COVID-19 vaccines still offer strong protection against a coronavirus mutant that now accounts for most U.S. infections.
The delta variant is surging through populations with low vaccination rates.
Researchers from France’s Pasteur Institute reported new evidence Thursday in the journal Nature that full vaccination is critical.
In laboratory tests, a single dose of the two-dose Pfizer or AstraZeneca vaccines “barely inhibited” the delta variant.
But after a second dose just about everyone experienced a big boost in immunity.