In a piece published by NPR last week, entitled, “Do I Need to Worry About the Delta Variant If I’m Vaccinated?” researchers, other scientists, and even the World Health Organization say that possibility is pretty unlikely. They wrote:

The COVID-19 vaccines are expected to be protective against the new virus variants, according to the World Health Organization.

And those variant (there are several: alpha, delta, but there’s also delta plus) are likely covered by all, current vaccines against the original virus. Here’s the data from the article about the three vaccines in use in the U.S: (emphasis added)

As for the vaccines, one study of the delta variant in Scotland from the University of Edinburgh found that while the variant was associated with a doubling in the risk of hospitalization in those infected in the region, the Pfizer …. vaccine offered a …. 60% protection…. against infection two weeks after the second dose. And a study from Public Health England showed that two doses of the Pfizer vaccine were 88% effective against symptomatic disease from the delta variant.

As for other vaccines, David Montefiori, director of the Laboratory for AIDS Vaccine Research and Development at Duke University Medical Center, is optimistic. Based on research he has conducted that has not yet been published, including the Moderna vaccine, he says that “delta does not look like it will be much of a threat to vaccines.”

Weatherhead has this to say about Johnson & Johnson’s effectiveness for the delta variant: “We just don’t have the data, but that doesn’t mean it’s not efficacious. We know it works against [other variants]. We’re going to have breakthrough infections, but the vaccines really prevent severe disease and death.” //

https://www.kqed.org/news/11879587/do-i-need-to-worry-about-the-delta-variant-if-im-vaccinated