Inhaled Versions of Two U.K. Covid-19 Vaccines to Be Studied

Researchers are beginning the first study of whether two of the U.K.’s experimental Covid-19 vaccines can be inhaled, a possible way of raising their ability to prevent the airborne infection.

The study will compare vaccine candidates from Imperial College London and the University of Oxford delivered by inhalation through the mouth, according to a statement Monday. The hope is that targeting cells in the lining of the lungs will induce a more effective immune response.

Scientists are searching for the most efficient way to protect the most vulnerable from the coronavirus, which has already struck more than 29 million people ...