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Articles on Adenovirus vaccine

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Dozens of coronavirus vaccines are in clinical trials in the U.S. Joao Paulo Burini/Moment via Getty Images

Will new vaccines be better at fighting coronavirus variants? 5 questions answered

Existing coronavirus vaccines are not as effective against newer variants of the virus. Two vaccine experts explain how new vaccines currently in development will likely offer better protection.
A mural in Rome depicts a white dove parachuting vials of COVID-19 vaccine. Several COVID-19 vaccines are based on a viral vector developed by Canadian Frank Graham decades ago. (AP Photo/Gregorio Borgia)

How the puzzle of viral vector vaccines was solved, leading to today’s COVID-19 shots

Viral vectors are modified viruses that trigger an immune response without causing infection. The vector that’s used in several COVID-19 vaccines was created decades ago by Canadian Frank Graham.

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