J&J Covid-19 Vaccine Shows Promising Preliminary Signs of Protecting Against Delta Variant

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Johnson & Johnson ’s Covid-19 vaccine showed promising signs in a small laboratory study of protecting against the Delta variant spreading across the U.S. and other countries, the company said.

In laboratory testing, the vaccine triggered strong levels of neutralizing antibodies in blood samples taken from eight vaccinated people, J&J said Thursday.

The positive performance adds to a growing set of evidence indicating currently authorized Covid-19 vaccines can safeguard against the Delta variant, which appears to be more contagious than earlier strains.

How well the J&J shot fares against the Delta variant has been closely watched by health authorities around the world.

Many countries have been counting on supplies, especially because the vaccine is simpler to ship, handle and store than the shots from Pfizer Inc. and its partner BioNTech SE and from Moderna Inc.

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