April 15, 2024



J&J, AstraZeneca explore modifying Covid vaccines in response to rare blood clot issue


By Berkeley Lovelace Jr

July 13, 2021

Johnson & Johnson and AstraZeneca are conducting early stage research into whether potential modifications of their Covid-19 vaccines could reduce or eliminate the risk of rare, but serious, blood clots associated with the shots.

The blood clotting issue, which some scientists are calling vaccine-induced immune thrombotic thrombocytopenia, or VITT, has been linked to both shots. Scientists have been discovering clues into how the clots form, boosting hopes of possibly reengineering the shots, a person familiar with the matter told CNBC.

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