Johnson and Johnson’s single-shot COVID-19 vaccine is effective against the highly contagious Delta variant, with an immune response lasting at least eight months, the company said.
The antibodies and immune system cells in the blood of eight people vaccinated with the J&J jab effectively neutralized the Delta strain, which was first identified in India, researchers found.
A second study with 20 vaccinated patients at Boston’s Beth Israel Medical Center had similar results.
The data was sent to bioRxiv, a free online site for unpublished scientific preprints where authors “are able to make their findings immediately available to the scientific community and receive feedback on draft manuscripts before they are submitted to journals,” according to the site.
The European Union’s disease control agency estimated the more contagious strain could account for 90 percent of new cases in the region by the end of August.